Mikaeus, the Unhallowed + Cauldron of Souls + Dross Scorpion + Viscera Seer

Mikaeus, the Unhallowed
Cauldron of Souls
Dross Scorpion
Viscera Seer

Requires
Mikaeus, the Unhallowed must be on the battlefield. Cauldron of Souls must be on the battlefield. Dross Scorpion must be on the battlefield. Viscera Seer must be on the battlefield.
Steps
  1. Activate Cauldron of Souls by tapping it, giving Dross Scorpion persist until end of turn.
  2. Activate Viscera Seer by sacrificing Dross Scorpion.
  3. Dross Scorpion dies, triggering its ability, its undying ability and its persist ability.
  4. Resolve the first Dross Scorpion trigger, untapping Cauldron of Souls.
  5. Resolve the Dross Scorpion persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  6. Activate Viscera Seer by sacrificing Dross Scorpion.
  7. Dross Scorpion dies, triggering its ability and its undying ability.
  8. Resolve the first Dross Scorpion trigger, untapping Cauldron of Souls.
  9. Resolve the second Dross Scorpion trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  10. Activate Viscera Seer by sacrificing Dross Scorpion.
  11. Dross Scorpion dies, triggering its ability and its persist ability.
  12. Repeat from step 4.
  13. Resolve all Viscera Seer abilities, causing you to scry 1 infinite times.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite scry 1.

Mikaeus, the Unhallowed
0.22% of 1337 decks 3 decks
Gev, Scaled Scorch
0.02% of 4293 decks 1 decks
Drana, Liberator of Malakir
0.25% of 400 decks 1 decks
Tergrid, God of Fright
0.01% of 8997 decks 1 decks
Shirei, Shizo's Caretaker
0.02% of 5330 decks 1 decks
Meren of Clan Nel Toth
0.01% of 14905 decks 1 decks
Lucius the Eternal
0.18% of 545 decks 1 decks
Kokusho, the Evening Star
0.12% of 817 decks 1 decks
Olivia, Crimson Bride
0.04% of 2525 decks 1 decks
Massacre Girl
0.06% of 1803 decks 1 decks
Imotekh the Stormlord
0.02% of 6538 decks 1 decks
High Synergy Cards
Ashnod's Altar
77% of 13 decks +69% synergy
Triskelion
62% of 13 decks +61% synergy
Urborg, Tomb of Yawgmoth
62% of 13 decks +52% synergy
Cabal Coffers
62% of 13 decks +51% synergy
Blood Artist
62% of 13 decks +50% synergy
Phyrexian Altar
54% of 13 decks +50% synergy
Gray Merchant of Asphodel
54% of 13 decks +45% synergy
K'rrik, Son of Yawgmoth
46% of 13 decks +44% synergy
Walking Ballista
46% of 13 decks +44% synergy
Altar of Dementia
46% of 13 decks +43% synergy
Top Cards
Dark Ritual
54% of 13 decks +32% synergy
Feed the Swarm
50% of 12 decks +32% synergy
Ayara, First of Locthwain
46% of 13 decks +42% synergy
Crypt Ghast
46% of 13 decks +41% synergy
Carrion Feeder
46% of 13 decks +41% synergy
Zulaport Cutthroat
46% of 13 decks +36% synergy
Solemn Simulacrum
46% of 13 decks +32% synergy
Phyrexian Arena
46% of 13 decks +31% synergy
Swiftfoot Boots
46% of 13 decks +18% synergy
Village Rites
42% of 12 decks +32% synergy
Creatures
Cryptic Trilobite
38% of 13 decks +38% synergy
Puppeteer Clique
38% of 13 decks +37% synergy
Yawgmoth, Thran Physician
38% of 13 decks +35% synergy
Massacre Wurm
38% of 13 decks +34% synergy
Syr Konrad, the Grim
38% of 13 decks +30% synergy
Tatterkite
31% of 13 decks +31% synergy
Workhorse
31% of 13 decks +31% synergy
Cinderhaze Wretch
31% of 13 decks +31% synergy
Butcher of Malakir
31% of 13 decks +27% synergy
Sheoldred, Whispering One
31% of 13 decks +26% synergy
Fain, the Broker
25% of 12 decks +24% synergy
Chainbreaker
23% of 13 decks +23% synergy
Putrid Goblin
23% of 13 decks +23% synergy
Chainer, Dementia Master
23% of 13 decks +22% synergy
Magus of the Coffers
23% of 13 decks +22% synergy
Hangarback Walker
23% of 13 decks +22% synergy
Kokusho, the Evening Star
23% of 13 decks +21% synergy
Sidisi, Undead Vizier
23% of 13 decks +21% synergy
Gravecrawler
23% of 13 decks +20% synergy
Plaguecrafter
23% of 13 decks +18% synergy
Instants
Vampiric Tutor
38% of 13 decks +20% synergy
Malakir Rebirth
25% of 12 decks +17% synergy
Go for the Throat
23% of 13 decks +16% synergy
Entomb
23% of 13 decks +16% synergy
Sorceries
Demonic Tutor
54% of 13 decks +31% synergy
Diabolic Intent
38% of 13 decks +30% synergy
Reanimate
38% of 13 decks +23% synergy
Toxic Deluge
38% of 13 decks +21% synergy
Victimize
31% of 13 decks +19% synergy
Torment of Hailfire
23% of 13 decks +18% synergy
Living Death
23% of 13 decks +18% synergy
Diabolic Tutor
23% of 13 decks +17% synergy
Damnation
23% of 13 decks +15% synergy
Utility Artifacts
Blasting Station
38% of 13 decks +38% synergy
Skullclamp
31% of 13 decks +18% synergy
Krark-Clan Ironworks
23% of 13 decks +22% synergy
Jet Medallion
23% of 13 decks +20% synergy
Bolas's Citadel
23% of 13 decks +14% synergy
Lightning Greaves
23% of 13 decks -2% synergy
Enchantments
Dictate of Erebos
38% of 13 decks +35% synergy
Animate Dead
38% of 13 decks +29% synergy
Black Market
31% of 13 decks +26% synergy
Grave Pact
23% of 13 decks +19% synergy
Utility Lands
Bojuka Bog
54% of 13 decks +23% synergy
Castle Locthwain
38% of 13 decks +33% synergy
Phyrexian Tower
38% of 13 decks +30% synergy
Cabal Stronghold
31% of 13 decks +27% synergy
Thespian's Stage
23% of 13 decks +20% synergy
High Market
23% of 13 decks +20% synergy
Rogue's Passage
23% of 13 decks +4% synergy
Reliquary Tower
23% of 13 decks -6% synergy
Mana Artifacts
Sol Ring
100% of 13 decks +16% synergy
Arcane Signet
62% of 13 decks -10% synergy
Mind Stone
31% of 13 decks +13% synergy
Sceptre of Eternal Glory
25% of 12 decks +24% synergy
Commander's Sphere
23% of 13 decks +8% synergy
Thought Vessel
23% of 13 decks +6% synergy
Fellwar Stone
23% of 13 decks +2% synergy
Lands
Foreboding Ruins
100% of 3 decks +84% synergy
Smoldering Marsh
100% of 3 decks +68% synergy
Command Tower
54% of 13 decks -20% synergy
Myriad Landscape
31% of 13 decks +11% synergy
Exotic Orchard
23% of 13 decks -12% synergy