Mikaeus, the Unhallowed + Cauldron of Souls + Dross Scorpion + Altar of Dementia

Mikaeus, the Unhallowed
Cauldron of Souls
Dross Scorpion
Altar of Dementia

Requires
Mikaeus, the Unhallowed must be on the battlefield. Cauldron of Souls must be on the battlefield. Dross Scorpion must be on the battlefield. Altar of Dementia must be on the battlefield.
Steps
  1. Activate Cauldron of Souls by tapping it, giving Dross Scorpion persist until end of turn.
  2. Activate Altar of Dementia 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 Altar of Dementia 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 Altar of Dementia by sacrificing Dross Scorpion.
  11. Dross Scorpion dies, triggering its ability and its persist ability.
  12. Repeat from step 4.
  13. Resolve all Altar of Dementia abilities, causing any number of players to mill infinite cards.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mill. Infinite sacrifice triggers. Infinite self-mill.

Mikaeus, the Unhallowed
0.13% of 1527 decks 2 decks
Sheoldred, the Apocalypse
0.01% of 9720 decks 1 decks
Alela, Artful Provocateur
0.01% of 12979 decks 1 decks
Olivia, Crimson Bride
0.04% of 2549 decks 1 decks
Imotekh the Stormlord
0.01% of 6808 decks 1 decks
Trazyn the Infinite
0.05% of 1898 decks 1 decks
Reaper King
0.02% of 5880 decks 1 decks
Gev, Scaled Scorch
0.02% of 6236 decks 1 decks
Korvold, Fae-Cursed King
0.01% of 16264 decks 1 decks
Tergrid, God of Fright
0.01% of 9848 decks 1 decks
Erebos, Bleak-Hearted
0.32% of 312 decks 1 decks
Wilhelt, the Rotcleaver
0.01% of 19555 decks 1 decks
Maralen of the Mornsong
0.06% of 1775 decks 1 decks
Alharu, Solemn Ritualist // Sengir, the Dark Baron
12.50% of 8 decks 1 decks
The Wise Mothman
0.01% of 17737 decks 1 decks
Drana, Liberator of Malakir
0.23% of 432 decks 1 decks
New Cards
Wastewood Verge
100% of 1 decks +94% synergy
Willowrush Verge
100% of 1 decks +94% synergy
Cursecloth Wrappings
25% of 4 decks +24% synergy
Gonti, Night Minister
25% of 4 decks +24% synergy
Monument to Endurance
25% of 4 decks +23% synergy
High Synergy Cards
Ashnod's Altar
88% of 17 decks +81% synergy
Phyrexian Altar
82% of 17 decks +79% synergy
Urborg, Tomb of Yawgmoth
65% of 17 decks +55% synergy
Cabal Coffers
59% of 17 decks +48% synergy
Viscera Seer
53% of 17 decks +44% synergy
Phyrexian Tower
47% of 17 decks +38% synergy
Crypt Ghast
41% of 17 decks +36% synergy
Living Death
41% of 17 decks +36% synergy
Blood Artist
47% of 17 decks +35% synergy
Triskelion
35% of 17 decks +35% synergy
Top Cards
Toxic Deluge
47% of 17 decks +29% synergy
Pitiless Plunderer
41% of 17 decks +33% synergy
Phyrexian Arena
41% of 17 decks +26% synergy
Lightning Greaves
41% of 17 decks +16% synergy
Swiftfoot Boots
41% of 17 decks +14% synergy
K'rrik, Son of Yawgmoth
35% of 17 decks +33% synergy
Carrion Feeder
35% of 17 decks +30% synergy
Gray Merchant of Asphodel
35% of 17 decks +26% synergy
Animate Dead
35% of 17 decks +26% synergy
Zulaport Cutthroat
35% of 17 decks +26% synergy
Game Changers
Demonic Tutor
53% of 17 decks +32% synergy
Vampiric Tutor
41% of 17 decks +24% synergy
Bolas's Citadel
29% of 17 decks +21% synergy
Mana Vault
24% of 17 decks +17% synergy
Ancient Tomb
24% of 17 decks +13% synergy
Opposition Agent
18% of 17 decks +11% synergy
Creatures
Tatterkite
29% of 17 decks +29% synergy
Gravecrawler
29% of 17 decks +26% synergy
Massacre Wurm
29% of 17 decks +25% synergy
Grim Poppet
24% of 17 decks +23% synergy
Kokusho, the Evening Star
24% of 17 decks +22% synergy
Walking Ballista
24% of 17 decks +21% synergy
Yawgmoth, Thran Physician
24% of 17 decks +20% synergy
Reassembling Skeleton
24% of 17 decks +20% synergy
Sheoldred, Whispering One
24% of 17 decks +19% synergy
Solemn Simulacrum
24% of 17 decks +10% synergy
Workhorse
18% of 17 decks +18% synergy
Cinderhaze Wretch
18% of 17 decks +18% synergy
Cryptic Trilobite
18% of 17 decks +17% synergy
Crystalline Crawler
18% of 17 decks +17% synergy
Pili-Pala
18% of 17 decks +17% synergy
Putrid Goblin
18% of 17 decks +17% synergy
Magus of the Coffers
18% of 17 decks +17% synergy
Chainer, Dementia Master
18% of 17 decks +17% synergy
Blood Pet
18% of 17 decks +16% synergy
Puppeteer Clique
18% of 17 decks +16% synergy
Sidisi, Undead Vizier
18% of 17 decks +16% synergy
Pawn of Ulamog
18% of 17 decks +16% synergy
Grave Titan
18% of 17 decks +15% synergy
Rune-Scarred Demon
18% of 17 decks +15% synergy
Noxious Gearhulk
18% of 17 decks +14% synergy
Butcher of Malakir
18% of 17 decks +14% synergy
Ayara, First of Locthwain
18% of 17 decks +14% synergy
Burnished Hart
18% of 17 decks +14% synergy
Syr Konrad, the Grim
18% of 17 decks +9% synergy
Instants
Dark Ritual
35% of 17 decks +13% synergy
Entomb
24% of 17 decks +16% synergy
Cabal Ritual
18% of 17 decks +13% synergy
Deadly Rollick
18% of 17 decks +6% synergy
Sorceries
Reanimate
35% of 17 decks +19% synergy
Buried Alive
29% of 17 decks +24% synergy
Diabolic Tutor
24% of 17 decks +17% synergy
Victimize
24% of 17 decks +12% synergy
Grim Tutor
18% of 17 decks +13% synergy
Torment of Hailfire
18% of 17 decks +13% synergy
Exsanguinate
18% of 17 decks +12% synergy
Damnation
18% of 17 decks +10% synergy
Night's Whisper
18% of 17 decks +9% synergy
Sign in Blood
18% of 17 decks +8% synergy
Feed the Swarm
18% of 17 decks +0% synergy
Utility Artifacts
Blasting Station
29% of 17 decks +29% synergy
Krark-Clan Ironworks
29% of 17 decks +28% synergy
Skullclamp
29% of 17 decks +18% synergy
Mind Stone
29% of 17 decks +13% synergy
Radiant Lotus
25% of 4 decks +24% synergy
Nim Deathmantle
24% of 17 decks +23% synergy
Hedron Archive
24% of 17 decks +21% synergy
Expedition Map
24% of 17 decks +21% synergy
Mesmeric Orb
18% of 17 decks +16% synergy
Sensei's Divining Top
18% of 17 decks +13% synergy
Commander's Sphere
18% of 17 decks +3% synergy
Enchantments
Necropotence
29% of 17 decks +24% synergy
Grave Pact
24% of 17 decks +19% synergy
Mortuary
18% of 17 decks +18% synergy
Necromancy
18% of 17 decks +14% synergy
Dictate of Erebos
18% of 17 decks +14% synergy
Exquisite Blood
18% of 17 decks +12% synergy
Bastion of Remembrance
18% of 17 decks +12% synergy
Planeswalkers
Liliana, Dreadhorde General
18% of 17 decks +14% synergy
Utility Lands
Bojuka Bog
53% of 17 decks +23% synergy
Reliquary Tower
47% of 17 decks +17% synergy
Wasteland
24% of 17 decks +22% synergy
Thespian's Stage
24% of 17 decks +21% synergy
Strip Mine
24% of 17 decks +21% synergy
High Market
24% of 17 decks +21% synergy
Cabal Stronghold
24% of 17 decks +20% synergy
Command Beacon
24% of 17 decks +19% synergy
Nykthos, Shrine to Nyx
24% of 17 decks +18% synergy
Takenuma, Abandoned Mire
24% of 17 decks +14% synergy
Volrath's Stronghold
18% of 17 decks +16% synergy
Castle Locthwain
18% of 17 decks +13% synergy
Mana Artifacts
Sol Ring
82% of 17 decks -2% synergy
Arcane Signet
41% of 17 decks -31% synergy
Gilded Lotus
24% of 17 decks +20% synergy
Thought Vessel
24% of 17 decks +6% synergy
Fellwar Stone
24% of 17 decks +3% synergy
Lands
Command Tower
76% of 17 decks +2% synergy
Myriad Landscape
35% of 17 decks +17% synergy
Path of Ancestry
24% of 17 decks +2% synergy
Exotic Orchard
24% of 17 decks -12% synergy
Gemstone Caverns
18% of 17 decks +13% synergy
Cavern of Souls
18% of 17 decks +11% synergy