Mikaeus, the Unhallowed + Retribution of the Ancients + Blood Vassal

Mikaeus, the Unhallowed
Retribution of the Ancients
Blood Vassal

Requires
Mikaeus, the Unhallowed must be on the battlefield. Retribution of the Ancients must be on the battlefield. Blood Vassal must be on the battlefield. Blood Vassal does not have a +1/+1 counter on it.
Steps
  1. Activate Blood Vassal by sacrificing it, adding .
  2. Blood Vassal dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. Activate Retribution of the Ancients by paying and removing the +1/+1 counter from Blood Vassal, targeting any creature.
  4. Repeat.
Results
Infinite black mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Reduce any number of target creatures' toughness to zero.

Mikaeus, the Unhallowed
1.05% of 1337 decks 14 decks
The Scarab God
0.01% of 10352 decks 1 decks
Horobi, Death's Wail
0.06% of 1673 decks 1 decks
Maga, Traitor to Mortals
0.50% of 200 decks 1 decks
Chainer, Dementia Master
0.06% of 1652 decks 1 decks
Marchesa, the Black Rose
0.01% of 9321 decks 1 decks
High Synergy Cards
Altar of Dementia
84% of 19 decks +81% synergy
Blood Pet
74% of 19 decks +72% synergy
Jet Medallion
74% of 19 decks +71% synergy
Phyrexian Altar
74% of 19 decks +70% synergy
Carrion Feeder
74% of 19 decks +69% synergy
Putrid Goblin
68% of 19 decks +68% synergy
Crypt Ghast
68% of 19 decks +63% synergy
Ashnod's Altar
68% of 19 decks +61% synergy
Gray Merchant of Asphodel
68% of 19 decks +59% synergy
Viscera Seer
68% of 19 decks +59% synergy
Top Cards
Dark Ritual
68% of 19 decks +46% synergy
Blood Artist
63% of 19 decks +51% synergy
Triskelion
53% of 19 decks +52% synergy
Plague Belcher
53% of 19 decks +52% synergy
Ayara, First of Locthwain
53% of 19 decks +49% synergy
Blasting Station
47% of 19 decks +47% synergy
Puppeteer Clique
47% of 19 decks +46% synergy
Walking Ballista
47% of 19 decks +45% synergy
Culling the Weak
47% of 19 decks +44% synergy
Zulaport Cutthroat
47% of 19 decks +37% synergy
Creatures
Accursed Marauder
100% of 3 decks +91% synergy
Basal Sliver
42% of 19 decks +42% synergy
Gravecrawler
42% of 19 decks +39% synergy
Yawgmoth, Thran Physician
42% of 19 decks +38% synergy
Tatterkite
37% of 19 decks +37% synergy
Lesser Masticore
37% of 19 decks +37% synergy
Wingrattle Scarecrow
32% of 19 decks +31% synergy
Crystalline Crawler
32% of 19 decks +31% synergy
Sidisi, Undead Vizier
32% of 19 decks +30% synergy
Grim Haruspex
32% of 19 decks +27% synergy
Pitiless Plunderer
32% of 19 decks +24% synergy
Cryptic Trilobite
26% of 19 decks +26% synergy
Fleshbag Marauder
26% of 19 decks +22% synergy
Syr Konrad, the Grim
26% of 19 decks +17% synergy
Solemn Simulacrum
26% of 19 decks +12% synergy
Orcish Bowmasters
21% of 14 decks +10% synergy
Chainbreaker
21% of 19 decks +21% synergy
Lingering Tormentor
21% of 19 decks +21% synergy
Workhorse
21% of 19 decks +21% synergy
K'rrik, Son of Yawgmoth
21% of 19 decks +19% synergy
Pawn of Ulamog
21% of 19 decks +19% synergy
Midnight Reaper
21% of 19 decks +17% synergy
Opposition Agent
21% of 19 decks +14% synergy
Dauthi Voidwalker
21% of 19 decks +13% synergy
Spincrusher
16% of 19 decks +16% synergy
Grim Poppet
16% of 19 decks +16% synergy
Hex Parasite
16% of 19 decks +15% synergy
Cavalier of Night
16% of 19 decks +15% synergy
Nirkana Revenant
16% of 19 decks +14% synergy
Merciless Executioner
16% of 19 decks +14% synergy
Undead Augur
16% of 19 decks +14% synergy
Butcher of Malakir
16% of 19 decks +12% synergy
Reassembling Skeleton
16% of 19 decks +12% synergy
Burnished Hart
16% of 19 decks +11% synergy
Plaguecrafter
16% of 19 decks +11% synergy
Instants
Imp's Mischief
42% of 19 decks +39% synergy
Cabal Ritual
42% of 19 decks +37% synergy
Vampiric Tutor
42% of 19 decks +24% synergy
Entomb
37% of 19 decks +29% synergy
Deadly Rollick
32% of 19 decks +21% synergy
Deadly Dispute
32% of 19 decks +20% synergy
Corrupted Conviction
27% of 15 decks +21% synergy
Village Rites
26% of 19 decks +16% synergy
Sacrifice
21% of 19 decks +20% synergy
Saw in Half
18% of 17 decks +15% synergy
Sudden Spoiling
16% of 19 decks +14% synergy
Dismember
16% of 19 decks +13% synergy
Tragic Slip
16% of 19 decks +12% synergy
Sorceries
Demonic Tutor
63% of 19 decks +41% synergy
Insatiable Avarice
50% of 6 decks +45% synergy
Reanimate
47% of 19 decks +32% synergy
Diabolic Intent
42% of 19 decks +33% synergy
Toxic Deluge
42% of 19 decks +25% synergy
Bubbling Muck
32% of 19 decks +30% synergy
Feed the Swarm
32% of 19 decks +13% synergy
Persist
26% of 19 decks +24% synergy
Night's Whisper
26% of 19 decks +17% synergy
Living Death
21% of 19 decks +16% synergy
Sign in Blood
21% of 19 decks +11% synergy
Victimize
21% of 19 decks +9% synergy
Black Sun's Zenith
16% of 19 decks +14% synergy
Bone Shards
16% of 19 decks +14% synergy
Rise of the Dark Realms
16% of 19 decks +13% synergy
Grim Tutor
16% of 19 decks +11% synergy
Imperial Seal
16% of 19 decks +10% synergy
Diabolic Tutor
16% of 19 decks +9% synergy
Damnation
16% of 19 decks +8% synergy
Utility Artifacts
Lightning Greaves
32% of 19 decks +6% synergy
Cauldron of Souls
26% of 19 decks +26% synergy
Bontu's Monument
26% of 19 decks +24% synergy
Skullclamp
26% of 19 decks +14% synergy
Agatha's Soul Cauldron
23% of 13 decks +21% synergy
Bolas's Citadel
21% of 19 decks +12% synergy
The One Ring
20% of 15 decks +11% synergy
Nim Deathmantle
16% of 19 decks +15% synergy
Wishclaw Talisman
16% of 19 decks +10% synergy
Enchantments
Black Market Connections
39% of 18 decks +28% synergy
Animate Dead
37% of 19 decks +28% synergy
Phyrexian Arena
37% of 19 decks +22% synergy
Heartless Summoning
26% of 19 decks +25% synergy
Grave Pact
26% of 19 decks +22% synergy
Necropotence
26% of 19 decks +21% synergy
Bastion of Remembrance
26% of 19 decks +20% synergy
The Meathook Massacre
22% of 18 decks +17% synergy
Black Market
21% of 19 decks +16% synergy
Dance of the Dead
16% of 19 decks +14% synergy
Necromancy
16% of 19 decks +13% synergy
Planeswalkers
Liliana, Dreadhorde General
16% of 19 decks +12% synergy
Utility Lands
Cabal Coffers
63% of 19 decks +52% synergy
Phyrexian Tower
53% of 19 decks +44% synergy
Urborg, Tomb of Yawgmoth
53% of 19 decks +43% synergy
Nykthos, Shrine to Nyx
37% of 19 decks +31% synergy
Bojuka Bog
37% of 19 decks +6% synergy
Takenuma, Abandoned Mire
33% of 18 decks +23% synergy
Cabal Stronghold
32% of 19 decks +28% synergy
Ancient Tomb
32% of 19 decks +21% synergy
Castle Locthwain
21% of 19 decks +16% synergy
Urza's Saga
21% of 19 decks +14% synergy
Reliquary Tower
21% of 19 decks -8% synergy
Lake of the Dead
16% of 19 decks +15% synergy
Witch's Cottage
16% of 19 decks +12% synergy
Command Beacon
16% of 19 decks +11% synergy
Mana Artifacts
Sol Ring
95% of 19 decks +10% synergy
Arcane Signet
68% of 19 decks -4% synergy
Lotus Petal
32% of 19 decks +25% synergy
Jeweled Lotus
26% of 19 decks +20% synergy
Mana Vault
26% of 19 decks +20% synergy
Fellwar Stone
26% of 19 decks +5% synergy
Mana Crypt
21% of 19 decks +12% synergy
Thought Vessel
21% of 19 decks +4% synergy
Mind Stone
21% of 19 decks +4% synergy
Charcoal Diamond
16% of 19 decks +10% synergy
Chrome Mox
16% of 19 decks +9% synergy
Lands
Cavern of Souls
16% of 19 decks +9% synergy