Liliana, Untouched by Death + Rooftop Storm + Carrion Feeder
Liliana, Untouched by Death
Rooftop Storm
Carrion Feeder
Requires
Liliana, Untouched by Death must be on the battlefield.
Rooftop Storm must be on the battlefield.
Carrion Feeder must be on the battlefield.
Liliana has at least three loyalty counters.
You control another nontoken Zombie.
Steps
- Activate Liliana's third loyalty ability by removing three loyalty counters from it, allowing you to cast Zombie spells from your graveyard this turn.
- Activate Carrion Feeder by sacrificing another nontoken Zombie, putting a +1/+1 counter on Carrion Feeder.
- Cast the Zombie from your graveyard by paying
.
- Repeat from step 2.
Results
Infinite +1/+1 counters on Carrion Feeder. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite storm count.
Temmet, Naktamun's Will
1.10% of 5170 decks
57 decks
Hashaton, Scarab's Fist
0.10% of 9782 decks
10 decks
Top Commanders
Wilhelt, the Rotcleaver
10.67% of 19353 decks
2065 decks
Gisa and Geralf
17.16% of 5152 decks
884 decks
Varina, Lich Queen
7.51% of 8261 decks
620 decks
The Scarab God
4.37% of 11025 decks
482 decks
Grimgrin, Corpse-Born
3.95% of 2608 decks
103 decks
Sidisi, Brood Tyrant
0.73% of 6824 decks
50 decks
Thraximundar
1.58% of 1959 decks
31 decks
Nevinyrral, Urborg Tyrant
1.86% of 1560 decks
29 decks
Narfi, Betrayer King
2.67% of 935 decks
25 decks
Muldrotha, the Gravetide
0.14% of 16870 decks
23 decks
Kraum, Ludevic's Opus // Tormod, the Desecrator
4.63% of 281 decks
13 decks
Morophon, the Boundless
0.08% of 10385 decks
8 decks
Ghost of Ramirez DePietro // Tormod, the Desecrator
1.45% of 551 decks
8 decks
Lord of Tresserhorn
0.78% of 770 decks
6 decks
Nekusar, the Mindrazer
0.02% of 20423 decks
5 decks
Vela the Night-Clad
0.56% of 708 decks
4 decks
New Cards
On Wings of Gold
48% of 246 decks
+46% synergy
Temmet, Naktamun's Will
40% of 250 decks
+36% synergy
Hashaton, Scarab's Fist
36% of 250 decks
+31% synergy
Renewed Solidarity
32% of 246 decks
+29% synergy
Wizened Mentor
22% of 246 decks
+21% synergy
High Synergy Cards
Gravecrawler
92% of 4482 decks
+89% synergy
Diregraf Captain
92% of 4482 decks
+89% synergy
Wayward Servant
90% of 747 decks
+88% synergy
Diregraf Colossus
84% of 4482 decks
+82% synergy
Undead Augur
83% of 4482 decks
+80% synergy
Death Baron
75% of 4482 decks
+73% synergy
Corpse Knight
78% of 747 decks
+72% synergy
Gray Merchant of Asphodel
80% of 4482 decks
+71% synergy
Necroduality
67% of 4482 decks
+66% synergy
Headless Rider
67% of 4482 decks
+65% synergy
Top Cards
Zombie Apocalypse
63% of 4482 decks
+61% synergy
Swords to Plowshares
61% of 747 decks
-2% synergy
Lord of the Accursed
61% of 4482 decks
+59% synergy
Undead Warchief
61% of 4482 decks
+59% synergy
Cryptbreaker
60% of 4482 decks
+58% synergy
Cemetery Reaper
59% of 4482 decks
+58% synergy
God-Eternal Oketra
58% of 747 decks
+57% synergy
Midnight Reaper
58% of 4482 decks
+54% synergy
Plague Belcher
57% of 4482 decks
+56% synergy
Champion of the Perished
54% of 4482 decks
+53% synergy
Game Changers
Demonic Tutor
24% of 4482 decks
+3% synergy
Cyclonic Rift
23% of 4482 decks
-3% synergy
Smothering Tithe
19% of 747 decks
-5% synergy
Vampiric Tutor
18% of 4482 decks
+1% synergy
Fierce Guardianship
13% of 4482 decks
-5% synergy
Enlightened Tutor
13% of 747 decks
-5% synergy
Bolas's Citadel
11% of 4482 decks
+3% synergy
Underworld Breach
10% of 84 decks
+4% synergy
Ancient Tomb
9% of 4482 decks
-1% synergy
Gaea's Cradle
5% of 96 decks
-1% synergy
Creatures
Fleshbag Marauder
50% of 4482 decks
+46% synergy
Noxious Ghoul
50% of 4482 decks
+49% synergy
Zul Ashur, Lich Lord
49% of 1535 decks
+48% synergy
Mikaeus, the Unhallowed
49% of 4482 decks
+46% synergy
Vengeful Dead
49% of 4482 decks
+48% synergy
Wight of the Reliquary
48% of 52 decks
+42% synergy
Hordewing Skaab
47% of 4482 decks
+46% synergy
Underrealm Lich
46% of 96 decks
+43% synergy
Cleaver Skaab
45% of 4482 decks
+44% synergy
Accursed Marauder
43% of 2417 decks
+38% synergy
Warren Soultrader
42% of 2492 decks
+36% synergy
Relentless Dead
42% of 4482 decks
+41% synergy
Ratadrabik of Urborg
41% of 747 decks
+38% synergy
Havengul Lich
40% of 4482 decks
+38% synergy
Lord of the Undead
39% of 4482 decks
+38% synergy
Gisa and Geralf
39% of 4482 decks
+37% synergy
Wilhelt, the Rotcleaver
39% of 4482 decks
+37% synergy
Sidisi, Undead Vizier
39% of 4482 decks
+37% synergy
Gleaming Overseer
37% of 4482 decks
+34% synergy
The Scarab God
35% of 4482 decks
+32% synergy
Grimgrin, Corpse-Born
33% of 4482 decks
+32% synergy
Zombie Master
33% of 4482 decks
+32% synergy
Archghoul of Thraben
32% of 4482 decks
+31% synergy
Poppet Stitcher
30% of 4482 decks
+29% synergy
Tomb Tyrant
29% of 4482 decks
+28% synergy
Geralf, Visionary Stitcher
28% of 4482 decks
+27% synergy
Overcharged Amalgam
27% of 4482 decks
+26% synergy
Binding Mummy
27% of 747 decks
+27% synergy
Acererak the Archlich
27% of 4482 decks
+26% synergy
Glissa Sunslayer
27% of 96 decks
+22% synergy
Sakura-Tribe Elder
27% of 96 decks
+9% synergy
Ghoulcaller Gisa
26% of 4482 decks
+25% synergy
Deathbringer Thoctar
26% of 84 decks
+26% synergy
Murderous Rider
26% of 4482 decks
+24% synergy
Shambling Ghast
26% of 4482 decks
+25% synergy
Birds of Paradise
23% of 96 decks
-4% synergy
Grave Titan
23% of 4482 decks
+20% synergy
Ravenous Rotbelly
22% of 4482 decks
+21% synergy
Shepherd of Rot
22% of 4482 decks
+21% synergy
Jodah, Archmage Eternal
21% of 14 decks
+18% synergy
Graveborn Muse
21% of 4482 decks
+21% synergy
Muldrotha, the Gravetide
21% of 96 decks
+14% synergy
Stitcher's Supplier
20% of 4482 decks
+17% synergy
Vile Entomber
20% of 4482 decks
+18% synergy
Jarad, Golgari Lich Lord
20% of 96 decks
+17% synergy
Liliana's Standard Bearer
20% of 4482 decks
+19% synergy
Grim Servant
19% of 2495 decks
+18% synergy
Eternal Skylord
19% of 4482 decks
+18% synergy
Prophet of the Scarab
19% of 889 decks
+17% synergy
Unstoppable Slasher
19% of 1886 decks
+16% synergy
Instants
Counterspell
48% of 4482 decks
+5% synergy
Anguished Unmaking
39% of 747 decks
+15% synergy
Assassin's Trophy
39% of 96 decks
+8% synergy
Path to Exile
36% of 747 decks
-10% synergy
Void Rend
35% of 747 decks
+21% synergy
Dark Ritual
32% of 4482 decks
+10% synergy
Lazotep Plating
31% of 4482 decks
+30% synergy
Entomb
29% of 4482 decks
+21% synergy
Negate
22% of 4482 decks
-1% synergy
Beast Within
20% of 96 decks
-18% synergy
An Offer You Can't Refuse
19% of 4482 decks
-2% synergy
Go for the Throat
19% of 4482 decks
+12% synergy
Despark
18% of 747 decks
+3% synergy
Bedevil
18% of 84 decks
+4% synergy
Teferi's Protection
18% of 747 decks
-2% synergy
Withering Torment
17% of 1867 decks
+9% synergy
Village Rites
16% of 4482 decks
+6% synergy
Terminate
15% of 84 decks
-5% synergy
Chaos Warp
15% of 84 decks
-16% synergy
Arcane Denial
15% of 4482 decks
-5% synergy
Rise of the Dread Marn
15% of 4482 decks
+14% synergy
Grisly Salvage
14% of 96 decks
+8% synergy
Dovin's Veto
13% of 747 decks
-5% synergy
Mana Drain
12% of 4482 decks
-3% synergy
Malakir Rebirth
12% of 4482 decks
+4% synergy
Swan Song
12% of 4482 decks
-5% synergy
Generous Gift
12% of 747 decks
-13% synergy
Fell the Profane
12% of 2492 decks
+3% synergy
Putrefy
11% of 96 decks
-4% synergy
Deadly Plot
11% of 4482 decks
+11% synergy
Sinister Sabotage
10% of 4482 decks
+10% synergy
Abrupt Decay
10% of 96 decks
+0% synergy
Infernal Grasp
10% of 4482 decks
+3% synergy
Tragic Slip
10% of 4482 decks
+6% synergy
Deadly Rollick
10% of 4482 decks
-1% synergy
Murder
10% of 4482 decks
+6% synergy
Harrow
9% of 96 decks
+0% synergy
Crop Rotation
9% of 96 decks
-0% synergy
Undermine
9% of 4482 decks
+8% synergy
Frantic Search
8% of 4482 decks
-4% synergy
Deflecting Swat
8% of 84 decks
-8% synergy
Mortify
8% of 747 decks
-4% synergy
Brainstorm
8% of 4482 decks
-12% synergy
Stroke of Midnight
8% of 662 decks
-2% synergy
Deadly Dispute
8% of 4482 decks
-3% synergy
Drown in the Loch
7% of 4482 decks
+2% synergy
Sink into Stupor
7% of 2492 decks
-2% synergy
Fact or Fiction
7% of 4482 decks
+1% synergy
Corrupted Conviction
7% of 4407 decks
+2% synergy
Fracture
7% of 747 decks
+0% synergy
Sorceries
Feed the Swarm
52% of 4482 decks
+34% synergy
Victimize
45% of 4482 decks
+33% synergy
Army of the Damned
37% of 4482 decks
+35% synergy
Empty the Laboratory
37% of 4482 decks
+36% synergy
Damn
35% of 747 decks
+19% synergy
Life from the Loam
30% of 96 decks
+26% synergy
Reanimate
29% of 4482 decks
+13% synergy
Distant Melody
28% of 4482 decks
+23% synergy
Living Death
27% of 4482 decks
+22% synergy
Toxic Deluge
26% of 4482 decks
+8% synergy
Buried Alive
26% of 4482 decks
+20% synergy
Diabolic Intent
23% of 4482 decks
+15% synergy
Cultivate
21% of 96 decks
-24% synergy
Farseek
18% of 96 decks
-16% synergy
Faithless Looting
17% of 84 decks
+0% synergy
Necrotic Hex
16% of 4482 decks
+16% synergy
Patriarch's Bidding
16% of 4482 decks
+13% synergy
Three Visits
16% of 96 decks
-9% synergy
Rampant Growth
15% of 96 decks
-20% synergy
Damnation
14% of 4482 decks
+7% synergy
Blasphemous Act
14% of 84 decks
-19% synergy
Nature's Lore
14% of 96 decks
-18% synergy
Dark Salvation
14% of 4482 decks
+13% synergy
Crippling Fear
13% of 4482 decks
+11% synergy
Squirming Emergence
13% of 75 decks
+11% synergy
Necromantic Selection
13% of 4482 decks
+12% synergy
Dread Return
13% of 4482 decks
+7% synergy
Dreadbore
12% of 84 decks
+10% synergy
Dread Summons
12% of 4482 decks
+11% synergy
Bala Ged Recovery
11% of 96 decks
+3% synergy
Blasphemous Edict
11% of 1487 decks
+3% synergy
Diabolic Tutor
10% of 4482 decks
+4% synergy
Kindred Dominance
10% of 4482 decks
+6% synergy
Agadeem's Awakening
10% of 4482 decks
+6% synergy
Splendid Reclamation
9% of 96 decks
+6% synergy
Kodama's Reach
9% of 96 decks
-21% synergy
Vanquish the Horde
9% of 747 decks
+5% synergy
Vandalblast
8% of 84 decks
-7% synergy
Supreme Verdict
8% of 747 decks
-5% synergy
Unmarked Grave
8% of 4482 decks
+6% synergy
Sevinne's Reclamation
8% of 747 decks
+1% synergy
Rise of the Dark Realms
8% of 4482 decks
+4% synergy
Ghouls' Night Out
8% of 4482 decks
+7% synergy
Lively Dirge
7% of 2775 decks
+6% synergy
Windfall
7% of 4482 decks
-6% synergy
Gamble
7% of 84 decks
-2% synergy
Rise of the Witch-king
7% of 88 decks
+2% synergy
Grim Tutor
7% of 4482 decks
+2% synergy
Austere Command
7% of 747 decks
-6% synergy
Vindicate
7% of 747 decks
+0% synergy
Utility Artifacts
Phyrexian Altar
49% of 4482 decks
+45% synergy
Ashnod's Altar
49% of 4482 decks
+42% synergy
Crowded Crypt
31% of 4482 decks
+29% synergy
Fist of Suns
29% of 14 decks
+22% synergy
Altar of Dementia
28% of 4482 decks
+25% synergy
Commander's Sphere
26% of 4482 decks
+11% synergy
Skullclamp
25% of 4482 decks
+13% synergy
Bontu's Monument
21% of 4482 decks
+19% synergy
Wand of Orcus
20% of 4482 decks
+20% synergy
Mind Stone
16% of 4482 decks
-1% synergy
Wayfarer's Bauble
14% of 4482 decks
+5% synergy
Herald's Horn
12% of 4482 decks
+6% synergy
Unscythe, Killer of Kings
12% of 84 decks
+12% synergy
Grimoire of the Dead
12% of 4482 decks
+11% synergy
Jet Medallion
10% of 4482 decks
+7% synergy
Lightning Greaves
9% of 4482 decks
-16% synergy
Pyre of Heroes
9% of 4482 decks
+9% synergy
Conduit of Worlds
8% of 96 decks
+3% synergy
Embercleave
7% of 84 decks
+4% synergy
Chainsaw
7% of 43 decks
+6% synergy
Swiftfoot Boots
7% of 4482 decks
-21% synergy
Birthing Pod
6% of 96 decks
+4% synergy
Vanquisher's Banner
6% of 4482 decks
+2% synergy
Blasting Station
6% of 4482 decks
+5% synergy
Nim Deathmantle
6% of 4482 decks
+5% synergy
Cryptcaller Chariot
5% of 906 decks
+4% synergy
Enchantments
Endless Ranks of the Dead
50% of 4482 decks
+49% synergy
Goblin Bombardment
30% of 84 decks
+23% synergy
Anointed Procession
29% of 747 decks
+21% synergy
Dreadhorde Invasion
26% of 4482 decks
+23% synergy
Liliana's Mastery
24% of 4482 decks
+23% synergy
Open the Graves
24% of 4482 decks
+22% synergy
Grave Pact
23% of 4482 decks
+19% synergy
Kindred Discovery
23% of 4482 decks
+15% synergy
Rhystic Study
20% of 4482 decks
-7% synergy
Sultai Ascendancy
20% of 96 decks
+18% synergy
Reconnaissance
18% of 747 decks
+15% synergy
The Meathook Massacre
17% of 4482 decks
+12% synergy
Necromancer's Covenant
15% of 747 decks
+14% synergy
Bastion of Remembrance
14% of 4482 decks
+8% synergy
Reflections of Littjara
14% of 4482 decks
+9% synergy
Phyrexian Arena
13% of 4482 decks
-2% synergy
Impact Tremors
13% of 84 decks
+3% synergy
Animate Dead
11% of 4482 decks
+2% synergy
Dictate of Erebos
11% of 4482 decks
+8% synergy
Secrets of the Dead
11% of 4482 decks
+10% synergy
Path of Discovery
10% of 96 decks
+10% synergy
Knowledge Is Power
10% of 563 decks
+9% synergy
Funeral Room // Awakening Hall
10% of 1890 decks
+8% synergy
Insidious Roots
10% of 73 decks
+4% synergy
Seal of Primordium
9% of 96 decks
+8% synergy
Black Market Connections
9% of 4482 decks
-2% synergy
Mystic Remora
8% of 4482 decks
-9% synergy
Parallel Lives
8% of 96 decks
+1% synergy
Sylvan Library
8% of 96 decks
-3% synergy
Graf Harvest
8% of 4482 decks
+7% synergy
Curse of the Restless Dead
8% of 4482 decks
+7% synergy
Black Market
7% of 4482 decks
+2% synergy
Call to the Grave
7% of 4482 decks
+7% synergy
Vampiric Rites
6% of 4482 decks
+4% synergy
Etchings of the Chosen
6% of 747 decks
+3% synergy
Pernicious Deed
6% of 96 decks
+5% synergy
Exploration
6% of 96 decks
-2% synergy
Shared Animosity
6% of 84 decks
+2% synergy
Curse of Disturbance
6% of 4482 decks
+5% synergy
Ripples of Undeath
5% of 2460 decks
+1% synergy
Cryptolith Rite
5% of 96 decks
+2% synergy
Doubling Season
5% of 96 decks
-4% synergy
Battles
Invasion of Amonkhet
6% of 4407 decks
+5% synergy
Planeswalkers
Liliana, Death's Majesty
37% of 4482 decks
+35% synergy
Liliana, Dreadhorde General
25% of 4482 decks
+21% synergy
Grist, the Hunger Tide
8% of 96 decks
+4% synergy
Tamiyo, Collector of Tales
6% of 96 decks
+5% synergy
Liliana, the Last Hope
6% of 4482 decks
+6% synergy
Nicol Bolas, Dragon-God
6% of 84 decks
+2% synergy
Utility Lands
Bojuka Bog
47% of 4482 decks
+18% synergy
Urborg, Tomb of Yawgmoth
35% of 4482 decks
+25% synergy
Unholy Grotto
34% of 4482 decks
+33% synergy
Phyrexian Tower
25% of 4482 decks
+17% synergy
Field of the Dead
24% of 4482 decks
+21% synergy
Cabal Coffers
23% of 4482 decks
+13% synergy
Reliquary Tower
23% of 4482 decks
-7% synergy
Mortuary Mire
21% of 4482 decks
+16% synergy
Three Tree City
20% of 2201 decks
+14% synergy
Boseiju, Who Endures
19% of 96 decks
-0% synergy
Accursed Duneyard
19% of 889 decks
+17% synergy
Takenuma, Abandoned Mire
18% of 4482 decks
+9% synergy
Crypt of Agadeem
17% of 4482 decks
+15% synergy
Vault of the Archangel
13% of 747 decks
+2% synergy
Shifting Woodland
13% of 47 decks
+6% synergy
Otawara, Soaring City
11% of 4482 decks
-5% synergy
Castle Locthwain
10% of 4482 decks
+5% synergy
Svogthos, the Restless Tomb
8% of 96 decks
+8% synergy
Nykthos, Shrine to Nyx
8% of 4482 decks
+2% synergy
Spymaster's Vault
7% of 2492 decks
+4% synergy
High Market
7% of 4482 decks
+4% synergy
Hall of Heliod's Generosity
6% of 747 decks
-0% synergy
Witch's Cottage
6% of 4482 decks
+3% synergy
Dryad Arbor
6% of 96 decks
+2% synergy
Nephalia Drownyard
6% of 4482 decks
+3% synergy
Mana Artifacts
Sol Ring
95% of 4482 decks
+10% synergy
Arcane Signet
90% of 4482 decks
+18% synergy
Talisman of Dominance
69% of 4482 decks
+37% synergy
Dimir Signet
64% of 4482 decks
+35% synergy
Talisman of Hierarchy
51% of 747 decks
+26% synergy
Orzhov Signet
42% of 747 decks
+15% synergy
Rakdos Signet
37% of 84 decks
+8% synergy
Talisman of Progress
26% of 747 decks
+2% synergy
Izzet Signet
25% of 84 decks
-3% synergy
Fellwar Stone
23% of 4482 decks
+2% synergy
Azorius Signet
23% of 747 decks
-3% synergy
Talisman of Indulgence
18% of 84 decks
-9% synergy
Patchwork Banner
17% of 2180 decks
+12% synergy
Golgari Signet
17% of 96 decks
+4% synergy
Talisman of Creativity
15% of 84 decks
-13% synergy
Heraldic Banner
14% of 4482 decks
+12% synergy
Talisman of Resilience
14% of 96 decks
+1% synergy
Thought Vessel
13% of 4482 decks
-4% synergy
Relic of Sauron
12% of 72 decks
+4% synergy
Talisman of Curiosity
12% of 96 decks
-0% synergy
Charcoal Diamond
9% of 4482 decks
+4% synergy
Sky Diamond
7% of 4482 decks
+2% synergy
Simic Signet
6% of 96 decks
-8% synergy
Lands
Command Tower
94% of 4482 decks
+20% synergy
Sunken Hollow
75% of 4482 decks
+40% synergy
Godless Shrine
62% of 747 decks
+21% synergy
Choked Estuary
57% of 4482 decks
+40% synergy
Overgrown Tomb
55% of 96 decks
+13% synergy
Isolated Chapel
53% of 747 decks
+24% synergy
Hallowed Fountain
53% of 747 decks
+12% synergy
Drowned Catacomb
51% of 4482 decks
+25% synergy
Tainted Isle
50% of 4482 decks
+39% synergy
Raffine's Tower
50% of 747 decks
+24% synergy
Indatha Triome
50% of 14 decks
+20% synergy
Opulent Palace
49% of 96 decks
+22% synergy
Blood Crypt
49% of 84 decks
+11% synergy
Steam Vents
49% of 84 decks
+10% synergy
Watery Grave
48% of 4482 decks
+8% synergy
Arcane Sanctum
48% of 747 decks
+20% synergy
Zagoth Triome
48% of 96 decks
+18% synergy
Caves of Koilos
48% of 747 decks
+19% synergy
Temple of Deceit
45% of 4482 decks
+29% synergy
Crumbling Necropolis
44% of 84 decks
+13% synergy
Path of Ancestry
44% of 4482 decks
+22% synergy
Ziatora's Proving Ground
44% of 16 decks
+14% synergy
Breeding Pool
44% of 96 decks
+3% synergy
Temple Garden
43% of 14 decks
+3% synergy
Savai Triome
42% of 19 decks
+16% synergy
Xander's Lounge
42% of 84 decks
+16% synergy
Darkwater Catacombs
41% of 4482 decks
+26% synergy
Shipwreck Marsh
41% of 4482 decks
+22% synergy
Vault of Champions
41% of 747 decks
+15% synergy
Dragonskull Summit
40% of 84 decks
+9% synergy
Woodland Cemetery
40% of 96 decks
+11% synergy
Underground River
39% of 4482 decks
+18% synergy
Sacred Foundry
37% of 19 decks
+1% synergy
Dimir Aqueduct
35% of 4482 decks
+18% synergy
Exotic Orchard
35% of 4482 decks
-1% synergy
Morphic Pool
35% of 4482 decks
+9% synergy
Llanowar Wastes
33% of 96 decks
+7% synergy
Unclaimed Territory
32% of 4482 decks
+27% synergy
Stomping Ground
31% of 16 decks
-9% synergy
Sea of Clouds
31% of 747 decks
+5% synergy
Polluted Delta
30% of 4482 decks
+19% synergy
Smoldering Marsh
30% of 84 decks
-3% synergy
Glacial Fortress
29% of 747 decks
+1% synergy
Prairie Stream
27% of 747 decks
-6% synergy
Yavimaya Coast
27% of 96 decks
+0% synergy
Hinterland Harbor
26% of 96 decks
-3% synergy
Underground Mortuary
26% of 73 decks
+14% synergy
Ketria Triome
25% of 16 decks
-7% synergy
Clearwater Pathway
25% of 4482 decks
+15% synergy
Luxury Suite
23% of 84 decks
-3% synergy