Deathbringer Thoctar + Basilisk Collar
Deathbringer Thoctar
Basilisk Collar
Requires
Deathbringer Thoctar must be on the battlefield.
Basilisk Collar must be on the battlefield.
Deathbringer Thoctar has at least one +1/+1 counter on it.
Basilisk Collar attached to Deathbringer Thoctar.
Steps
- Activate Deathbringer Thoctar by removing a +1/+1 counter from it, dealing 1 damage to any creature an opponent controls and causing you to gain 1 life.
- The creature dies as a state-based action due to Deathbringer Thoctar's deathtouch.
- Deathbringer Thoctar triggers, putting a +1/+1 counter on itself.
- Repeat as desired.
- You may also repeat this combo whenever a creature enters the battlefield under an opponent's control.
Results
Destroy all creatures opponents control. Destroy any creature that enters the battlefield under an opponent's control.
Top Commanders (4)
Zagras, Thief of Heartbeats
21.22% of 622 decks
132 decks
Kelsien, the Plague
18.59% of 4147 decks
771 decks
Lyzolda, the Blood Witch
16.38% of 409 decks
67 decks
Judith, the Scourge Diva
4.45% of 787 decks
35 decks
New Cards (5)
Taii Wakeen, Perfect Shot
41% of 27 decks
+40% synergy
Magda, the Hoardmaster
40% of 30 decks
+36% synergy
Bounty Board
20% of 30 decks
+19% synergy
Codsworth, Handy Helper
19% of 37 decks
+16% synergy
Ertha Jo, Frontier Mentor
19% of 27 decks
+18% synergy
High Synergy Cards (10)
Otharri, Suns' Glory
81% of 483 decks
+80% synergy
Minthara, Merciless Soul
77% of 687 decks
+77% synergy
Drumbellower
68% of 740 decks
+67% synergy
Open the Armory
65% of 793 decks
+62% synergy
Morbid Opportunist
58% of 1237 decks
+55% synergy
Rune of Mortality
52% of 1279 decks
+52% synergy
General's Enforcer
52% of 793 decks
+51% synergy
Blood Cultist
51% of 1313 decks
+51% synergy
Harvester of Souls
50% of 1311 decks
+49% synergy
Gift of Doom
48% of 1302 decks
+48% synergy
Top Cards (10)
Vorpal Sword
58% of 1262 decks
+57% synergy
Swiftfoot Boots
55% of 1312 decks
+27% synergy
Gorgon's Head
55% of 1309 decks
+55% synergy
Cultivate
51% of 87 decks
+28% synergy
Sting, the Glinting Dagger
48% of 462 decks
+47% synergy
Ruinous Ultimatum
47% of 793 decks
+45% synergy
Farseek
47% of 87 decks
+31% synergy
Crackling Doom
47% of 794 decks
+46% synergy
Sakura-Tribe Elder
46% of 87 decks
+37% synergy
Kalemne, Disciple of Iroas
46% of 793 decks
+46% synergy
Creatures (50)
Mari, the Killing Quill
45% of 1164 decks
+45% synergy
Archetype of Finality
44% of 1309 decks
+44% synergy
Daxos the Returned
43% of 793 decks
+42% synergy
Goblin Sharpshooter
42% of 1313 decks
+41% synergy
Cunning Sparkmage
41% of 1313 decks
+41% synergy
Ankle Shanker
40% of 794 decks
+40% synergy
Falthis, Shadowcat Familiar
40% of 1288 decks
+39% synergy
Lae'zel, Vlaakith's Champion
39% of 696 decks
+37% synergy
Mathas, Fiend Seeker
39% of 793 decks
+39% synergy
Sun Titan
37% of 794 decks
+32% synergy
Vulshok Sorcerer
37% of 1313 decks
+37% synergy
White Plume Adventurer
37% of 696 decks
+36% synergy
Ignoble Hierarch
36% of 81 decks
+33% synergy
Termination Facilitator
36% of 761 decks
+35% synergy
Zagras, Thief of Heartbeats
35% of 1292 decks
+35% synergy
Assault Intercessor
34% of 531 decks
+34% synergy
Slaughter Specialist
34% of 1242 decks
+34% synergy
Void Beckoner
31% of 1301 decks
+31% synergy
Rakdos Ickspitter
31% of 1313 decks
+31% synergy
Razorfin Hunter
31% of 52 decks
+31% synergy
Athreos, Shroud-Veiled
30% of 793 decks
+30% synergy
Izzet Staticaster
29% of 52 decks
+29% synergy
Humble Defector
27% of 1306 decks
+26% synergy
Prodigal Sorcerer
27% of 52 decks
+27% synergy
Mother of Runes
26% of 794 decks
+23% synergy
Blood Artist
26% of 1311 decks
+20% synergy
Prodigal Pyromancer
26% of 1313 decks
+26% synergy
Eternal Witness
25% of 87 decks
+15% synergy
Robaran Mercenaries
25% of 554 decks
+25% synergy
Zuran Spellcaster
25% of 52 decks
+25% synergy
Tor Wauki the Younger
24% of 929 decks
+24% synergy
Torbran, Thane of Red Fell
24% of 1302 decks
+22% synergy
Gelectrode
23% of 52 decks
+23% synergy
Solemn Simulacrum
22% of 1313 decks
+8% synergy
Akiri, Fearless Voyager
22% of 783 decks
+21% synergy
Massacre Girl, Known Killer
22% of 117 decks
+20% synergy
Gisa, Glorious Resurrector
21% of 1246 decks
+20% synergy
Orcish Bowmasters
21% of 401 decks
+14% synergy
Thornwind Faeries
21% of 52 decks
+21% synergy
Mycoloth
20% of 87 decks
+19% synergy
Birds of Paradise
20% of 87 decks
+8% synergy
Chatterfang, Squirrel General
19% of 83 decks
+18% synergy
Suq'Ata Firewalker
19% of 52 decks
+19% synergy
Rootwater Hunter
19% of 52 decks
+19% synergy
Diregraf Captain
19% of 52 decks
+18% synergy
Clackbridge Troll
19% of 1302 decks
+18% synergy
Vithian Stinger
18% of 1313 decks
+18% synergy
Mahadi, Emporium Master
17% of 1103 decks
+16% synergy
Grimgrin, Corpse-Born
17% of 52 decks
+17% synergy
Sprouting Thrinax
17% of 87 decks
+17% synergy
Instants (50)
Boros Charm
44% of 794 decks
+38% synergy
Swords to Plowshares
44% of 794 decks
+16% synergy
Stroke of Midnight
38% of 210 decks
+31% synergy
Mirrodin Avenged
37% of 561 decks
+36% synergy
You Are Already Dead
36% of 1188 decks
+36% synergy
Fracture
35% of 773 decks
+33% synergy
Despark
34% of 793 decks
+30% synergy
Generous Gift
30% of 793 decks
+18% synergy
Beast Within
30% of 87 decks
+11% synergy
Terminate
29% of 1313 decks
+25% synergy
Dire Tactics
28% of 793 decks
+27% synergy
Chaos Warp
27% of 1312 decks
+12% synergy
Mortify
26% of 794 decks
+24% synergy
Offer Immortality
25% of 628 decks
+25% synergy
Rakdos Charm
25% of 1311 decks
+22% synergy
Bedevil
22% of 1302 decks
+18% synergy
Anguished Unmaking
20% of 793 decks
+15% synergy
Assassin's Trophy
20% of 85 decks
+14% synergy
Heroic Intervention
20% of 85 decks
+6% synergy
Bladebrand
19% of 1302 decks
+19% synergy
Path to Exile
19% of 794 decks
-1% synergy
Tyvar's Stand
18% of 44 decks
+15% synergy
Counterspell
17% of 52 decks
-4% synergy
Teferi's Protection
14% of 793 decks
+4% synergy
Return of the Wildspeaker
13% of 85 decks
+6% synergy
Malakir Rebirth
13% of 1291 decks
+8% synergy
Toxin Analysis
12% of 128 decks
+12% synergy
Virulent Swipe
12% of 1313 decks
+12% synergy
Flawless Maneuver
12% of 791 decks
+8% synergy
Utter End
12% of 794 decks
+10% synergy
Dramatic Reversal
12% of 49 decks
+9% synergy
Enlightened Tutor
12% of 794 decks
+4% synergy
Tamiyo's Safekeeping
12% of 76 decks
+9% synergy
Tragic Slip
12% of 1311 decks
+10% synergy
Wear // Tear
12% of 794 decks
+10% synergy
Arcane Denial
12% of 52 decks
+2% synergy
Brainstorm
12% of 52 decks
+0% synergy
Putrefy
11% of 87 decks
+8% synergy
Gaea's Gift
10% of 48 decks
+9% synergy
Krosan Grip
10% of 87 decks
+6% synergy
Touch of Moonglove
10% of 1306 decks
+10% synergy
Dark Ritual
10% of 1313 decks
-1% synergy
To Arms!
10% of 794 decks
+10% synergy
Cyclonic Rift
10% of 52 decks
-5% synergy
Deflecting Palm
9% of 794 decks
+8% synergy
Shriveling Rot
9% of 1313 decks
+9% synergy
Jund Charm
9% of 87 decks
+9% synergy
Nature's Claim
9% of 87 decks
+4% synergy
Deathsprout
8% of 85 decks
+7% synergy
Artifact Mutation
8% of 87 decks
+7% synergy
Sorceries (50)
Mythos of Snapdax
42% of 793 decks
+42% synergy
Unfinished Business
41% of 183 decks
+40% synergy
Rampant Growth
38% of 87 decks
+21% synergy
Kodama's Reach
36% of 87 decks
+20% synergy
Read the Bones
34% of 1311 decks
+30% synergy
Sign in Blood
26% of 1313 decks
+21% synergy
Blasphemous Act
25% of 1311 decks
+9% synergy
Nature's Lore
24% of 87 decks
+9% synergy
Vandalblast
24% of 1311 decks
+16% synergy
Call of the Death-Dweller
22% of 1301 decks
+22% synergy
Painful Truths
22% of 1306 decks
+20% synergy
Feed the Swarm
21% of 1291 decks
+12% synergy
Night's Whisper
21% of 1313 decks
+16% synergy
Steelshaper's Gift
18% of 794 decks
+17% synergy
Three Visits
16% of 87 decks
+4% synergy
Drown in Ichor
15% of 667 decks
+14% synergy
Single Combat
15% of 793 decks
+14% synergy
Damn
15% of 770 decks
+11% synergy
Contest of Claws
14% of 29 decks
+13% synergy
Vindicate
13% of 794 decks
+12% synergy
Demonic Tutor
12% of 1313 decks
+0% synergy
Culling Ritual
12% of 83 decks
+10% synergy
Rishkar's Expertise
12% of 85 decks
+7% synergy
Chandra's Ignition
12% of 1306 decks
+10% synergy
Faithless Looting
11% of 1311 decks
+3% synergy
Austere Command
11% of 794 decks
+5% synergy
Unearth
11% of 1313 decks
+9% synergy
Sevinne's Reclamation
9% of 793 decks
+6% synergy
Divine Reckoning
9% of 794 decks
+8% synergy
Farewell
8% of 740 decks
+2% synergy
Hull Breach
8% of 87 decks
+7% synergy
Treasure Cruise
8% of 50 decks
+5% synergy
Diabolic Tutor
8% of 1313 decks
+4% synergy
Reconstruct History
8% of 776 decks
+7% synergy
Victimize
8% of 1313 decks
+2% synergy
Fabricate
8% of 52 decks
+5% synergy
Jeska's Will
7% of 1285 decks
-2% synergy
Mass Diminish
6% of 48 decks
+6% synergy
Bushwhack
6% of 48 decks
+5% synergy
Rip Apart
6% of 773 decks
+5% synergy
Toxic Deluge
6% of 1310 decks
-2% synergy
Vat Emergence
6% of 667 decks
+5% synergy
Traverse the Outlands
6% of 85 decks
+5% synergy
Bala Ged Recovery
6% of 85 decks
+1% synergy
Life's Legacy
6% of 86 decks
+5% synergy
Rite of Replication
6% of 52 decks
+4% synergy
Windfall
6% of 52 decks
-1% synergy
Decimate
6% of 87 decks
+4% synergy
Regrowth
6% of 87 decks
+4% synergy
Harmonize
6% of 87 decks
+1% synergy
Utility Artifacts (39)
Gorgon Flail
41% of 1313 decks
+41% synergy
Thornbite Staff
38% of 1313 decks
+37% synergy
Hunter's Blowgun
37% of 227 decks
+36% synergy
Quietus Spike
35% of 1313 decks
+34% synergy
The Skullspore Nexus
29% of 24 decks
+25% synergy
Magewright's Stone
27% of 1313 decks
+26% synergy
Thousand-Year Elixir
26% of 1313 decks
+23% synergy
Shadowspear
25% of 1301 decks
+22% synergy
Lightning Greaves
24% of 1313 decks
-2% synergy
Battlemage's Bracers
21% of 1276 decks
+20% synergy
Illusionist's Bracers
21% of 1311 decks
+19% synergy
Wayfarer's Bauble
19% of 1313 decks
+8% synergy
Mithril Coat
19% of 474 decks
+12% synergy
Glaring Spotlight
16% of 1311 decks
+16% synergy
Unscythe, Killer of Kings
15% of 52 decks
+15% synergy
The Great Henge
12% of 85 decks
+7% synergy
Scythe of the Wretched
10% of 1313 decks
+10% synergy
Skullclamp
10% of 1313 decks
-3% synergy
Nazgûl Battle-Mace
10% of 237 decks
+9% synergy
Whispersilk Cloak
10% of 1313 decks
+6% synergy
Ozolith, the Shattered Spire
10% of 41 decks
+6% synergy
Puppet Strings
9% of 1313 decks
+9% synergy
Mage Slayer
9% of 87 decks
+9% synergy
Sword of the Animist
8% of 1306 decks
+3% synergy
Sunforger
8% of 794 decks
+7% synergy
Ashnod's Altar
8% of 1313 decks
-0% synergy
Mask of Griselbrand
7% of 1246 decks
+7% synergy
Halo Fountain
7% of 726 decks
+6% synergy
Robe of Stars
7% of 768 decks
+6% synergy
Silver Shroud Costume
7% of 56 decks
+3% synergy
Birthing Pod
7% of 87 decks
+6% synergy
Darksteel Plate
7% of 1313 decks
+5% synergy
Viridian Longbow
6% of 1313 decks
+6% synergy
Tarrian's Soulcleaver
6% of 248 decks
+3% synergy
Loxodon Warhammer
6% of 1313 decks
+4% synergy
Whip of Erebos
6% of 1311 decks
+4% synergy
Staff of Nin
6% of 1311 decks
+5% synergy
The Reaver Cleaver
5% of 912 decks
+4% synergy
Sword of Truth and Justice
5% of 1302 decks
+4% synergy
Enchantments (50)
Fighter Class
38% of 768 decks
+37% synergy
Rhythm of the Wild
26% of 85 decks
+21% synergy
Death Pits of Rath
24% of 1313 decks
+24% synergy
Black Market
23% of 1313 decks
+20% synergy
Phyrexian Arena
21% of 1313 decks
+14% synergy
Revel in Riches
21% of 1303 decks
+19% synergy
Aspect of Gorgon
21% of 1309 decks
+21% synergy
Moldervine Reclamation
21% of 85 decks
+19% synergy
Rooftop Storm
21% of 52 decks
+20% synergy
Retreat to Hagra
21% of 1306 decks
+20% synergy
Forge Anew
20% of 324 decks
+19% synergy
Curiosity
19% of 52 decks
+17% synergy
Smothering Tithe
19% of 793 decks
+7% synergy
Grave Betrayal
18% of 1311 decks
+17% synergy
Dismiss into Dream
17% of 52 decks
+17% synergy
Sigil of Sleep
17% of 52 decks
+17% synergy
Eternal Thirst
17% of 1307 decks
+17% synergy
Deathreap Ritual
16% of 86 decks
+15% synergy
Fecundity
16% of 87 decks
+16% synergy
Ophidian Eye
15% of 52 decks
+15% synergy
Keen Sense
15% of 87 decks
+14% synergy
Beastmaster Ascension
14% of 87 decks
+11% synergy
Trouble in Pairs
13% of 76 decks
+8% synergy
At Knifepoint
12% of 40 decks
+11% synergy
Riveteers Ascendancy
12% of 75 decks
+11% synergy
Food Chain
11% of 87 decks
+11% synergy
Primal Vigor
11% of 87 decks
+10% synergy
Greater Good
11% of 87 decks
+9% synergy
Parallel Lives
11% of 87 decks
+8% synergy
Doubling Season
11% of 87 decks
+7% synergy
Agent of the Shadow Thieves
11% of 1089 decks
+11% synergy
Sigarda's Aid
11% of 793 decks
+9% synergy
Life Insurance
10% of 726 decks
+10% synergy
Rite of Passage
10% of 87 decks
+10% synergy
Snake Umbra
10% of 87 decks
+9% synergy
Necroduality
10% of 41 decks
+9% synergy
Cowardice
10% of 52 decks
+10% synergy
Intruder Alarm
10% of 52 decks
+9% synergy
Garruk's Uprising
9% of 85 decks
+3% synergy
Quest for Renewal
9% of 87 decks
+8% synergy
Black Market Connections
9% of 975 decks
+3% synergy
Theater of Horrors
9% of 1302 decks
+9% synergy
Court of Ardenvale
9% of 189 decks
+8% synergy
Unnatural Growth
9% of 78 decks
+7% synergy
Wizard Class
9% of 45 decks
+7% synergy
Goblin Bombardment
9% of 1313 decks
+5% synergy
Rakdos Joins Up
9% of 34 decks
+7% synergy
Gift of Immortality
9% of 794 decks
+8% synergy
Spiteful Banditry
8% of 478 decks
+7% synergy
Forging the Tyrite Sword
8% of 778 decks
+8% synergy
Planeswalkers (8)
Kaya, Geist Hunter
12% of 743 decks
+12% synergy
Xenagos, the Reveler
11% of 87 decks
+11% synergy
Vraska, Golgari Queen
8% of 85 decks
+8% synergy
Nicol Bolas, Planeswalker
8% of 52 decks
+7% synergy
Vraska, Betrayal's Sting
7% of 722 decks
+4% synergy
Geyadrone Dihada
6% of 47 decks
+6% synergy
Ashiok, Dream Render
6% of 48 decks
+5% synergy
Dihada, Binder of Wills
6% of 563 decks
+6% synergy
Utility Lands (27)
Vault of the Archangel
55% of 794 decks
+53% synergy
Bojuka Bog
38% of 1313 decks
+22% synergy
Rogue's Passage
35% of 1311 decks
+17% synergy
Axgard Armory
25% of 778 decks
+24% synergy
Arcane Lighthouse
24% of 1307 decks
+23% synergy
Detection Tower
24% of 1303 decks
+23% synergy
Kessig Wolf Run
20% of 87 decks
+16% synergy
Khalni Garden
15% of 87 decks
+14% synergy
Grim Backwoods
14% of 87 decks
+13% synergy
Reliquary Tower
12% of 1313 decks
-16% synergy
Urborg, Tomb of Yawgmoth
12% of 1313 decks
+1% synergy
Boseiju, Who Endures
12% of 76 decks
+3% synergy
Karn's Bastion
12% of 1302 decks
+7% synergy
Temple of the False God
11% of 1313 decks
+1% synergy
Sunhome, Fortress of the Legion
10% of 794 decks
+9% synergy
Creeping Tar Pit
10% of 52 decks
+9% synergy
Seat of the Synod
10% of 52 decks
+6% synergy
Buried Ruin
9% of 1312 decks
+4% synergy
Skarrg, the Rage Pits
8% of 87 decks
+7% synergy
Llanowar Reborn
8% of 87 decks
+7% synergy
Castle Locthwain
7% of 1301 decks
+4% synergy
Kher Keep
6% of 1313 decks
+5% synergy
Shizo, Death's Storehouse
6% of 1313 decks
+4% synergy
Academy Ruins
6% of 52 decks
+3% synergy
High Market
5% of 1313 decks
+2% synergy
Cabal Coffers
5% of 1313 decks
-1% synergy
Takenuma, Abandoned Mire
5% of 1188 decks
-1% synergy
Mana Artifacts (27)
Sol Ring
85% of 1313 decks
+0% synergy
Arcane Signet
82% of 1301 decks
+11% synergy
Orzhov Signet
60% of 794 decks
+53% synergy
Rakdos Signet
60% of 1313 decks
+52% synergy
Boros Signet
55% of 794 decks
+49% synergy
Patriar's Seal
43% of 1052 decks
+41% synergy
Talisman of Dominance
33% of 52 decks
+25% synergy
Talisman of Indulgence
30% of 1313 decks
+24% synergy
Talisman of Hierarchy
29% of 793 decks
+24% synergy
Izzet Signet
29% of 52 decks
+22% synergy
Dimir Signet
29% of 52 decks
+21% synergy
Talisman of Conviction
27% of 793 decks
+23% synergy
Commander's Sphere
27% of 1307 decks
+10% synergy
Fellwar Stone
22% of 1313 decks
+1% synergy
Mind Stone
21% of 1313 decks
+3% synergy
Talisman of Creativity
21% of 48 decks
+14% synergy
Golgari Signet
16% of 87 decks
+13% synergy
Bandit's Haul
13% of 39 decks
+12% synergy
Savai Crystal
12% of 793 decks
+12% synergy
Gruul Signet
11% of 87 decks
+9% synergy
Talisman of Impulse
10% of 87 decks
+9% synergy
Mardu Banner
9% of 794 decks
+9% synergy
Obelisk of Jund
9% of 87 decks
+9% synergy
Talisman of Resilience
8% of 85 decks
+6% synergy
Chromatic Lantern
8% of 1311 decks
-2% synergy
Fire Diamond
6% of 1313 decks
+3% synergy
Charcoal Diamond
6% of 1313 decks
+3% synergy
Lands (50)
Command Tower
89% of 1312 decks
+16% synergy
Nomad Outpost
76% of 794 decks
+73% synergy
Crumbling Necropolis
62% of 52 decks
+58% synergy
Savage Lands
55% of 87 decks
+53% synergy
Stomping Ground
45% of 87 decks
+36% synergy
Smoldering Marsh
45% of 1306 decks
+37% synergy
Dragonskull Summit
44% of 1313 decks
+38% synergy
Ziatora's Proving Ground
44% of 75 decks
+40% synergy
Overgrown Tomb
43% of 87 decks
+33% synergy
Xander's Lounge
42% of 38 decks
+38% synergy
Exotic Orchard
42% of 1313 decks
+7% synergy
Savai Triome
40% of 791 decks
+37% synergy
Cinder Glade
39% of 85 decks
+31% synergy
Steam Vents
38% of 52 decks
+29% synergy
Watery Grave
38% of 52 decks
+28% synergy
Evolving Wilds
38% of 1313 decks
+16% synergy
Blood Crypt
37% of 1313 decks
+28% synergy
Caves of Koilos
36% of 794 decks
+30% synergy
Isolated Chapel
36% of 794 decks
+30% synergy
Godless Shrine
35% of 794 decks
+25% synergy
Sunken Hollow
35% of 49 decks
+26% synergy
Sacred Foundry
34% of 794 decks
+26% synergy
Clifftop Retreat
33% of 794 decks
+28% synergy
Sulfur Falls
33% of 52 decks
+26% synergy
Rakdos Carnarium
33% of 1313 decks
+29% synergy
Battlefield Forge
32% of 794 decks
+27% synergy
Vault of Champions
31% of 780 decks
+25% synergy
Drowned Catacomb
31% of 52 decks
+25% synergy
Spectator Seating
31% of 780 decks
+25% synergy
Temple of Malice
30% of 1309 decks
+27% synergy
Temple of Triumph
29% of 794 decks
+25% synergy
Luxury Suite
29% of 1303 decks
+23% synergy
Rootbound Crag
29% of 87 decks
+24% synergy
Temple of Silence
28% of 794 decks
+24% synergy
Woodland Cemetery
28% of 87 decks
+22% synergy
Shivan Reef
27% of 52 decks
+21% synergy
Orzhov Basilica
26% of 794 decks
+23% synergy
Myriad Landscape
26% of 1307 decks
+5% synergy
Terramorphic Expanse
26% of 1313 decks
+9% synergy
Boros Garrison
25% of 794 decks
+21% synergy
Temple of Epiphany
24% of 51 decks
+19% synergy
Spire Garden
24% of 85 decks
+18% synergy
Training Center
23% of 47 decks
+17% synergy
Temple of Malady
23% of 87 decks
+20% synergy
Golgari Rot Farm
23% of 87 decks
+19% synergy
Rockfall Vale
22% of 78 decks
+17% synergy
Sulfurous Springs
21% of 1313 decks
+17% synergy
Sundown Pass
21% of 748 decks
+18% synergy
Underground River
21% of 52 decks
+17% synergy
Haunted Ridge
21% of 1248 decks
+17% synergy