Krenko, Mob Boss + Umbral Mantle + Skirk Prospector

Krenko, Mob Boss
Umbral Mantle
Skirk Prospector

Requires
Krenko, Mob Boss must be on the battlefield. Umbral Mantle must be on the battlefield. Skirk Prospector must be on the battlefield. You control at least two additional Goblins. Krenko does not have summoning sickness. Umbral Mantle attached to Krenko.
Steps
  1. Activate Krenko using its own ability by tapping it, creating at least four 1/1 Goblin creature tokens.
  2. Activate Skirk Prospector three times by sacrificing three Goblin tokens, adding rrr.
  3. Activate Krenko using its ability from Umbral Mantle by paying 3 and untapping it, giving itself +2/+2 until end of turn.
  4. Repeat any number of times.
  5. Once you have infinite Goblin tokens, you may activate Skirk Prospector any number of times.
Results
Infinite creature tokens. Infinite death triggers. Infinite ETB. Infinite LTB. Infinitely large Krenko, Mob Boss until end of turn. Infinite red mana. Infinite sacrifice triggers.

Top Commanders (1)
Krenko, Mob Boss
25.56% of 18356 decks 4691 decks
New Cards (5)
Siege-Gang Lieutenant
100% of 3 decks +99% synergy
Reckless Lackey
41% of 70 decks +40% synergy
Great Train Heist
37% of 70 decks +30% synergy
Return the Favor
32% of 94 decks +27% synergy
Lavaspur Boots
26% of 70 decks +19% synergy
High Synergy Cards (10)
Goblin Warchief
95% of 5036 decks +94% synergy
Goblin Matron
94% of 5036 decks +92% synergy
Goblin Chieftain
90% of 5036 decks +89% synergy
Goblin Bombardment
90% of 5036 decks +87% synergy
Impact Tremors
89% of 5030 decks +85% synergy
Brightstone Ritual
82% of 5036 decks +81% synergy
Goblin Recruiter
80% of 5036 decks +80% synergy
Pashalik Mons
79% of 4998 decks +79% synergy
Conspicuous Snoop
78% of 4947 decks +78% synergy
Goblin Trashmaster
76% of 5014 decks +76% synergy
Top Cards (10)
Skullclamp
81% of 5036 decks +69% synergy
Goblin Chirurgeon
76% of 5036 decks +75% synergy
Hobgoblin Bandit Lord
72% of 4739 decks +71% synergy
Sling-Gang Lieutenant
71% of 139 decks +71% synergy
Goblin King
69% of 5036 decks +68% synergy
Ignoble Hierarch
68% of 40 decks +65% synergy
Lightning Greaves
65% of 5036 decks +40% synergy
Goblin Anarchomancer
65% of 63 decks +62% synergy
Chaos Warp
65% of 5036 decks +49% synergy
Purphoros, God of the Forge
64% of 5034 decks +62% synergy
Creatures (50)
Kiki-Jiki, Mirror Breaker
64% of 5036 decks +62% synergy
Krenko, Tin Street Kingpin
61% of 5004 decks +58% synergy
Siege-Gang Commander
60% of 5036 decks +59% synergy
Muxus, Goblin Grandee
57% of 4925 decks +56% synergy
Boggart Harbinger
56% of 140 decks +56% synergy
Frogtosser Banneret
56% of 140 decks +55% synergy
Rundvelt Hordemaster
55% of 3495 decks +55% synergy
Warren Instigator
54% of 5036 decks +53% synergy
Goblin Ringleader
50% of 5036 decks +50% synergy
Goro-Goro, Disciple of Ryusei
49% of 4473 decks +48% synergy
Goblin Lackey
49% of 5036 decks +49% synergy
Munitions Expert
48% of 139 decks +48% synergy
Mad Auntie
48% of 140 decks +48% synergy
Goblin Sharpshooter
47% of 5036 decks +47% synergy
Dockside Extortionist
45% of 4984 decks +37% synergy
Murderous Redcap
44% of 140 decks +43% synergy
Grumgully, the Generous
41% of 64 decks +40% synergy
Moria Marauder
40% of 2012 decks +39% synergy
Krenko, Baron of Tin Street
39% of 301 decks +39% synergy
Roaming Throne
39% of 538 decks +23% synergy
Moggcatcher
39% of 5036 decks +38% synergy
Magnus the Red
38% of 13 decks +38% synergy
Exalted Flamer of Tzeentch
38% of 13 decks +37% synergy
Goblin Piledriver
38% of 5036 decks +37% synergy
Vexing Shusher
37% of 65 decks +36% synergy
Goblin Instigator
36% of 5014 decks +36% synergy
Mirkwood Bats
35% of 40 decks +28% synergy
Imperial Recruiter
35% of 5036 decks +32% synergy
Mogg War Marshal
34% of 5036 decks +33% synergy
Goblin Engineer
33% of 5000 decks +31% synergy
Legion Warboss
33% of 5008 decks +32% synergy
Battle Cry Goblin
32% of 4739 decks +32% synergy
Dark-Dweller Oracle
31% of 5014 decks +31% synergy
Zoyowa Lava-Tongue
31% of 16 decks +31% synergy
Gorbag of Minas Morgul
31% of 42 decks +31% synergy
Beetleback Chief
31% of 5036 decks +30% synergy
Putrid Goblin
30% of 139 decks +30% synergy
Boggart Mob
30% of 140 decks +30% synergy
Stalactite Stalker
29% of 17 decks +29% synergy
Treasure Nabber
29% of 5011 decks +28% synergy
Gempalm Incinerator
29% of 5036 decks +29% synergy
Witty Roastmaster
28% of 4082 decks +27% synergy
Torch Courier
28% of 5008 decks +28% synergy
Balmor, Battlemage Captain
27% of 15 decks +26% synergy
Legion Loyalist
26% of 5036 decks +26% synergy
Slimefoot and Squee
25% of 16 decks +25% synergy
Ruby, Daring Tracker
25% of 16 decks +24% synergy
Third Path Iconoclast
25% of 12 decks +23% synergy
Squee, Dubious Monarch
24% of 3578 decks +23% synergy
Rulik Mons, Warren Chief
24% of 46 decks +24% synergy
Instants (50)
Battle Hymn
63% of 5036 decks +62% synergy
Eladamri's Call
56% of 9 decks +53% synergy
Path to Exile
46% of 26 decks +27% synergy
Dovin's Veto
38% of 8 decks +33% synergy
Counterspell
38% of 24 decks +16% synergy
Enlightened Tutor
35% of 26 decks +26% synergy
Swords to Plowshares
35% of 26 decks +6% synergy
Deflecting Swat
34% of 4951 decks +26% synergy
Terminate
34% of 140 decks +29% synergy
Red Elemental Blast
32% of 5036 decks +29% synergy
Massive Raid
32% of 5036 decks +31% synergy
Bedevil
32% of 139 decks +28% synergy
Worldly Tutor
31% of 65 decks +24% synergy
Pyroblast
30% of 5036 decks +26% synergy
Demand Answers
29% of 301 decks +23% synergy
Mana Drain
29% of 24 decks +22% synergy
Cyclonic Rift
29% of 24 decks +15% synergy
Vampiric Tutor
29% of 140 decks +19% synergy
Anguished Unmaking
27% of 11 decks +22% synergy
Abrade
27% of 5020 decks +21% synergy
Tibalt's Trickery
26% of 4845 decks +23% synergy
Thrill of Possibility
25% of 4975 decks +20% synergy
Negate
25% of 24 decks +13% synergy
Boros Charm
23% of 26 decks +17% synergy
Dark Ritual
23% of 140 decks +12% synergy
Lightning Bolt
22% of 5036 decks +17% synergy
Village Rites
22% of 138 decks +16% synergy
Mystical Tutor
21% of 24 decks +13% synergy
Brainstorm
21% of 24 decks +9% synergy
Heroic Intervention
20% of 65 decks +6% synergy
Last-Ditch Effort
19% of 5036 decks +19% synergy
Deadly Dispute
18% of 130 decks +13% synergy
Beast Within
18% of 65 decks -1% synergy
Pull from Tomorrow
17% of 23 decks +16% synergy
Fierce Guardianship
17% of 23 decks +9% synergy
Corrupted Conviction
17% of 48 decks +14% synergy
Frantic Search
17% of 24 decks +11% synergy
Silence
15% of 26 decks +12% synergy
Teferi's Protection
15% of 26 decks +6% synergy
Assassin's Trophy
15% of 40 decks +9% synergy
Seething Song
14% of 5036 decks +11% synergy
Valakut Awakening
14% of 4893 decks +11% synergy
Outnumber
14% of 5027 decks +14% synergy
You See a Pair of Goblins
14% of 4762 decks +13% synergy
Wild Magic Surge
13% of 3912 decks +11% synergy
Your Temple Is Under Attack
13% of 23 decks +12% synergy
Izzet Charm
12% of 24 decks +11% synergy
Blue Sun's Zenith
12% of 24 decks +11% synergy
Nasty End
12% of 40 decks +11% synergy
Muddle the Mixture
12% of 24 decks +10% synergy
Sorceries (50)
Goblin War Strike
60% of 5036 decks +60% synergy
Krenko's Command
46% of 5036 decks +45% synergy
Vandalblast
45% of 5036 decks +36% synergy
Cultivate
45% of 65 decks +22% synergy
Jeska's Will
44% of 4884 decks +35% synergy
Gamble
43% of 5036 decks +39% synergy
Faithless Looting
43% of 5036 decks +35% synergy
Kodama's Reach
43% of 65 decks +28% synergy
Dragon Fodder
41% of 5036 decks +40% synergy
Rampant Growth
40% of 65 decks +23% synergy
Demonic Tutor
39% of 140 decks +27% synergy
Hordeling Outburst
34% of 5031 decks +33% synergy
Blasphemous Act
32% of 5036 decks +15% synergy
Farseek
29% of 65 decks +13% synergy
Diabolic Intent
28% of 140 decks +23% synergy
Nature's Lore
26% of 65 decks +11% synergy
Mob Justice
26% of 5036 decks +25% synergy
Goblin Grenade
23% of 5036 decks +23% synergy
Three Visits
23% of 65 decks +11% synergy
Boggart Birth Rite
19% of 140 decks +19% synergy
Patriarch's Bidding
19% of 140 decks +17% synergy
Feed the Swarm
18% of 137 decks +8% synergy
Sea Gate Restoration
17% of 23 decks +15% synergy
Empty the Warrens
17% of 5036 decks +16% synergy
Shamanic Revelation
17% of 65 decks +12% synergy
Distant Melody
17% of 24 decks +14% synergy
Ponder
17% of 24 decks +10% synergy
Burn at the Stake
17% of 5036 decks +16% synergy
Wheel of Fortune
16% of 5036 decks +14% synergy
Beseech the Mirror
16% of 25 decks +13% synergy
Fodder Launch
14% of 140 decks +14% synergy
Wheel of Misfortune
14% of 4885 decks +12% synergy
Victimize
14% of 140 decks +8% synergy
Diabolic Tutor
13% of 140 decks +9% synergy
Relentless Assault
13% of 5036 decks +11% synergy
Fabricate
12% of 24 decks +9% synergy
Reckless Handling
12% of 2066 decks +11% synergy
Decimate
12% of 65 decks +11% synergy
Grim Tutor
12% of 140 decks +9% synergy
Steelshaper's Gift
12% of 26 decks +10% synergy
Austere Command
12% of 26 decks +6% synergy
Reforge the Soul
11% of 5036 decks +10% synergy
Harmonize
11% of 65 decks +6% synergy
Living Death
11% of 140 decks +8% synergy
Shatterskull Smashing
10% of 4892 decks +8% synergy
Tormenting Voice
10% of 5031 decks +8% synergy
Goblin War Party
10% of 5000 decks +9% synergy
Mana Geyser
9% of 5036 decks +6% synergy
Read the Bones
9% of 140 decks +4% synergy
Reanimate
9% of 140 decks +1% synergy
Utility Artifacts (39)
Sting, the Glinting Dagger
63% of 1853 decks +61% synergy
Thornbite Staff
60% of 5036 decks +59% synergy
Ashnod's Altar
59% of 5036 decks +51% synergy
Swiftfoot Boots
57% of 5036 decks +29% synergy
Thousand-Year Elixir
56% of 5036 decks +54% synergy
Staff of Domination
51% of 5036 decks +49% synergy
Ruby Medallion
45% of 5036 decks +43% synergy
Phyrexian Altar
38% of 5036 decks +33% synergy
Coat of Arms
37% of 5036 decks +35% synergy
Throne of the God-Pharaoh
36% of 5021 decks +35% synergy
Sword of the Paruns
28% of 5036 decks +28% synergy
Illusionist's Bracers
28% of 5036 decks +26% synergy
Hazoret's Monument
27% of 5021 decks +26% synergy
Rings of Brighthearth
25% of 5036 decks +23% synergy
Magewright's Stone
23% of 5036 decks +22% synergy
Hammer of Purphoros
20% of 5034 decks +19% synergy
Vanquisher's Banner
19% of 5017 decks +15% synergy
Herald's Horn
18% of 5019 decks +12% synergy
Eldrazi Monument
17% of 5036 decks +15% synergy
The One Ring
13% of 2304 decks +4% synergy
Pyre of Heroes
12% of 4848 decks +12% synergy
Battlemage's Bracers
12% of 4812 decks +11% synergy
Sensei's Divining Top
10% of 5036 decks +4% synergy
Birthing Pod
9% of 65 decks +8% synergy
Altar of the Brood
9% of 5031 decks +8% synergy
Bootleggers' Stash
9% of 57 decks +7% synergy
Helm of the Host
8% of 5016 decks +5% synergy
Altar of Dementia
8% of 5036 decks +5% synergy
Bolas's Citadel
8% of 139 decks +3% synergy
The Great Henge
8% of 64 decks +3% synergy
Slate of Ancestry
7% of 5036 decks +7% synergy
Idol of Oblivion
7% of 4984 decks +3% synergy
Puppet Strings
6% of 5036 decks +6% synergy
Cloudstone Curio
6% of 5036 decks +5% synergy
Door of Destinies
6% of 5036 decks +4% synergy
Wishclaw Talisman
6% of 138 decks +3% synergy
Symmetry Matrix
5% of 2963 decks +5% synergy
Goblin Charbelcher
5% of 5036 decks +5% synergy
Wayfarer's Bauble
5% of 5036 decks -6% synergy
Enchantments (50)
Rising of the Day
54% of 1449 decks +51% synergy
Blood Moon
51% of 5036 decks +50% synergy
Shared Animosity
48% of 5036 decks +46% synergy
Mana Echoes
47% of 5036 decks +47% synergy
Fervor
44% of 5036 decks +43% synergy
Boggart Shenanigans
37% of 5036 decks +37% synergy
Rhythm of the Wild
31% of 64 decks +26% synergy
Mardu Ascendancy
27% of 11 decks +27% synergy
Smothering Tithe
27% of 26 decks +15% synergy
Quest for the Goblin Lord
27% of 5036 decks +26% synergy
City on Fire
26% of 2262 decks +23% synergy
Rhystic Study
25% of 24 decks +11% synergy
Mass Hysteria
25% of 5036 decks +24% synergy
Parallel Lives
25% of 65 decks +21% synergy
Kindred Discovery
22% of 23 decks +18% synergy
Phyrexian Arena
21% of 140 decks +14% synergy
Descendants' Fury
21% of 995 decks +21% synergy
Doubling Season
18% of 65 decks +14% synergy
Aggravated Assault
18% of 5036 decks +16% synergy
Arcane Adaptation
17% of 23 decks +17% synergy
Cryptolith Rite
17% of 65 decks +15% synergy
Meticulous Excavation
17% of 18 decks +16% synergy
Black Market Connections
16% of 99 decks +11% synergy
Fable of the Mirror-Breaker
15% of 4246 decks +14% synergy
Grim Reaper's Sprint
14% of 163 decks +12% synergy
Food Chain
14% of 65 decks +13% synergy
Goblin War Drums
14% of 5036 decks +13% synergy
Sorcerer Class
14% of 22 decks +13% synergy
Outpost Siege
13% of 5030 decks +12% synergy
Metallurgic Summonings
13% of 23 decks +12% synergy
Thousand-Year Storm
13% of 23 decks +12% synergy
Intruder Alarm
12% of 24 decks +12% synergy
Fighter Class
12% of 25 decks +11% synergy
Raid Bombardment
12% of 5036 decks +11% synergy
Ghostly Prison
12% of 26 decks +6% synergy
Growing Rites of Itlimoc
11% of 64 decks +8% synergy
Bastion of Remembrance
11% of 138 decks +8% synergy
Riveteers Ascendancy
11% of 37 decks +10% synergy
Price of Glory
11% of 5036 decks +10% synergy
Dictate of Erebos
9% of 140 decks +7% synergy
Sylvan Library
9% of 65 decks +3% synergy
Roar of Resistance
8% of 2556 decks +8% synergy
Guardian Project
8% of 64 decks +4% synergy
Beastmaster Ascension
8% of 65 decks +5% synergy
Moldervine Reclamation
8% of 40 decks +5% synergy
Warstorm Surge
7% of 5036 decks +5% synergy
Kyren Negotiations
7% of 5036 decks +7% synergy
Splinter Twin
7% of 5036 decks +7% synergy
March from the Black Gate
7% of 44 decks +6% synergy
Ashling's Prerogative
7% of 5036 decks +7% synergy
Battles (1)
Invasion of Ikoria
12% of 24 decks +10% synergy
Planeswalkers (3)
Saheeli, Sublime Artificer
17% of 23 decks +16% synergy
Xenagos, the Reveler
8% of 65 decks +7% synergy
Koth, Fire of Resistance
6% of 2590 decks +5% synergy
Utility Lands (42)
Castle Embereth
40% of 4975 decks +38% synergy
Diamond City
36% of 163 decks +33% synergy
Nykthos, Shrine to Nyx
35% of 5034 decks +30% synergy
Den of the Bugbear
31% of 4762 decks +30% synergy
Bojuka Bog
29% of 140 decks +13% synergy
War Room
26% of 4884 decks +20% synergy
Buried Ruin
25% of 5036 decks +19% synergy
Ancient Tomb
25% of 5036 decks +14% synergy
Valakut, the Molten Pinnacle
21% of 5036 decks +20% synergy
Forgotten Cave
18% of 5036 decks +16% synergy
Mystic Sanctuary
17% of 23 decks +11% synergy
Hall of the Bandit Lord
17% of 5036 decks +16% synergy
Urza's Saga
15% of 4778 decks +8% synergy
Hidden Necropolis
14% of 21 decks +13% synergy
Otawara, Soaring City
14% of 21 decks +6% synergy
Great Furnace
14% of 5036 decks +11% synergy
Command Beacon
13% of 5026 decks +8% synergy
Academy Ruins
12% of 24 decks +10% synergy
Gaea's Cradle
12% of 65 decks +10% synergy
Goblin Burrows
11% of 5036 decks +11% synergy
Phyrexian Tower
11% of 140 decks +7% synergy
Takenuma, Abandoned Mire
10% of 115 decks +4% synergy
Crystal Vein
10% of 5036 decks +9% synergy
Inventors' Fair
10% of 5021 decks +5% synergy
Sokenzan, Crucible of Defiance
10% of 4473 decks +7% synergy
Reliquary Tower
9% of 5036 decks -19% synergy
Mines of Moria
9% of 2026 decks +7% synergy
Sandstone Needle
9% of 5036 decks +9% synergy
Hidden Volcano
9% of 616 decks +8% synergy
Hanweir Battlements
9% of 5023 decks +8% synergy
Strip Mine
8% of 5036 decks +5% synergy
Flamekin Village
8% of 5030 decks +7% synergy
Tree of Tales
8% of 65 decks +7% synergy
Kessig Wolf Run
8% of 65 decks +4% synergy
Barad-dûr
8% of 40 decks +6% synergy
Vault of Whispers
7% of 140 decks +5% synergy
Cabal Coffers
7% of 140 decks +1% synergy
Boseiju, Who Endures
7% of 58 decks -2% synergy
Dwarven Ruins
7% of 5036 decks +7% synergy
Mortuary Mire
6% of 139 decks +4% synergy
Temple of the False God
6% of 5036 decks -4% synergy
Rogue's Passage
6% of 5036 decks -13% synergy
Mana Artifacts (29)
Sol Ring
92% of 5036 decks +7% synergy
Arcane Signet
54% of 4975 decks -17% synergy
Rakdos Signet
39% of 140 decks +31% synergy
Patriar's Seal
38% of 3912 decks +36% synergy
Izzet Signet
29% of 24 decks +22% synergy
Talisman of Indulgence
27% of 140 decks +22% synergy
Boros Signet
27% of 26 decks +21% synergy
Jeweled Lotus
27% of 4884 decks +19% synergy
Throne of Eldraine
26% of 830 decks +23% synergy
Mana Crypt
25% of 5036 decks +13% synergy
Mind Stone
24% of 5036 decks +5% synergy
Talisman of Conviction
19% of 26 decks +14% synergy
Heraldic Banner
19% of 4980 decks +17% synergy
Chrome Mox
16% of 5036 decks +10% synergy
Mana Vault
16% of 5036 decks +10% synergy
Gruul Signet
15% of 65 decks +13% synergy
Fire Diamond
15% of 5036 decks +12% synergy
Talisman of Impulse
14% of 65 decks +12% synergy
Talisman of Creativity
13% of 23 decks +7% synergy
Lotus Petal
13% of 5036 decks +6% synergy
Fellwar Stone
11% of 5036 decks -10% synergy
Liquimetal Torque
9% of 4791 decks +5% synergy
Talisman of Resilience
8% of 40 decks +5% synergy
Mox Opal
7% of 5036 decks +2% synergy
Commander's Sphere
6% of 5030 decks -10% synergy
Mox Diamond
6% of 5036 decks +2% synergy
Caged Sun
6% of 5036 decks +3% synergy
Gauntlet of Power
6% of 5036 decks +5% synergy
Strixhaven Stadium
5% of 4815 decks +5% synergy
Lands (50)
Blood Crypt
48% of 140 decks +39% synergy
Smoldering Marsh
47% of 139 decks +40% synergy
Dragonskull Summit
47% of 140 decks +41% synergy
Cinder Glade
46% of 65 decks +38% synergy
Drowned Catacomb
45% of 11 decks +39% synergy
Ziatora's Proving Ground
43% of 37 decks +40% synergy
Auntie's Hovel
43% of 140 decks +43% synergy
Luxury Suite
40% of 139 decks +34% synergy
Stomping Ground
38% of 65 decks +29% synergy
Raucous Theater
38% of 8 decks +34% synergy
Steam Vents
38% of 24 decks +28% synergy
Overgrown Tomb
35% of 40 decks +26% synergy
Training Center
35% of 23 decks +28% synergy
Cavern of Souls
34% of 5036 decks +28% synergy
Stormcarved Coast
33% of 21 decks +30% synergy
Sunpetal Grove
33% of 9 decks +28% synergy
Haunted Ridge
32% of 126 decks +28% synergy
Rockfall Vale
32% of 60 decks +27% synergy
Battlefield Forge
31% of 26 decks +26% synergy
Morphic Pool
30% of 10 decks +23% synergy
Sulfurous Springs
29% of 140 decks +25% synergy
Savage Lands
28% of 40 decks +25% synergy
Isolated Chapel
27% of 11 decks +21% synergy
Spectator Seating
27% of 26 decks +21% synergy
Path of Ancestry
26% of 5019 decks +7% synergy
Rootbound Crag
26% of 65 decks +21% synergy
Rakdos Carnarium
26% of 140 decks +22% synergy
Foreboding Ruins
24% of 139 decks +21% synergy
Blightstep Pathway
24% of 135 decks +22% synergy
Graven Cairns
24% of 140 decks +22% synergy
Sacred Foundry
23% of 26 decks +15% synergy
Shadowblood Ridge
23% of 140 decks +20% synergy
Riverglide Pathway
22% of 23 decks +19% synergy
Karplusan Forest
22% of 65 decks +18% synergy
Gruul Turf
22% of 65 decks +18% synergy
Cascade Bluffs
21% of 24 decks +18% synergy
Shivan Reef
21% of 24 decks +15% synergy
Sulfur Falls
21% of 24 decks +14% synergy
Spire Garden
20% of 64 decks +15% synergy
Temple of Malice
20% of 140 decks +17% synergy
Game Trail
20% of 65 decks +17% synergy
Woodland Cemetery
20% of 40 decks +15% synergy
Blackcleave Cliffs
19% of 140 decks +18% synergy
Needleverge Pathway
19% of 26 decks +17% synergy
Clifftop Retreat
19% of 26 decks +14% synergy
Llanowar Wastes
18% of 40 decks +12% synergy
Badlands
17% of 140 decks +14% synergy
Myriad Landscape
17% of 5030 decks -4% synergy
Swiftwater Cliffs
17% of 24 decks +15% synergy
Temple of Epiphany
17% of 24 decks +13% synergy