Mikaeus, the Unhallowed + Cauldron of Souls + Dross Scorpion + Ashnod's Altar

Mikaeus, the Unhallowed
Cauldron of Souls
Dross Scorpion
Ashnod's Altar

Requires
Mikaeus, the Unhallowed must be on the battlefield. Cauldron of Souls must be on the battlefield. Dross Scorpion must be on the battlefield. Ashnod's Altar must be on the battlefield.
Steps
  1. Activate Cauldron of Souls by tapping it, giving Dross Scorpion persist until end of turn.
  2. Activate Ashnod's Altar by sacrificing Dross Scorpion, adding .
  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 Ashnod's Altar by sacrificing Dross Scorpion, adding .
  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 Ashnod's Altar by sacrificing Dross Scorpion, adding .
  11. Dross Scorpion dies, triggering its ability and its persist ability.
  12. Repeat from step 4.
Results
Infinite colorless mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Mikaeus, the Unhallowed
0.29% of 1358 decks 4 decks
Gev, Scaled Scorch
0.06% of 4662 decks 3 decks
Imotekh the Stormlord
0.03% of 6524 decks 2 decks
Drana, Liberator of Malakir
0.25% of 401 decks 1 decks
Olivia, Crimson Bride
0.04% of 2535 decks 1 decks
Nicol Bolas, the Ravager
0.01% of 6988 decks 1 decks
Reyhan, Last of the Abzan // Silas Renn, Seeker Adept
1.37% of 73 decks 1 decks
Trazyn the Infinite
0.05% of 1922 decks 1 decks
Judith, the Scourge Diva
0.12% of 858 decks 1 decks
Erebos, Bleak-Hearted
0.36% of 274 decks 1 decks
Rendmaw, Creaking Nest
0.03% of 3706 decks 1 decks
Fain, the Broker
0.37% of 270 decks 1 decks
Megatron, Tyrant
0.03% of 3864 decks 1 decks
Alharu, Solemn Ritualist // Sengir, the Dark Baron
16.67% of 6 decks 1 decks
Shirei, Shizo's Caretaker
0.02% of 5420 decks 1 decks
Tergrid, God of Fright
0.01% of 9163 decks 1 decks
Kokusho, the Evening Star
0.12% of 840 decks 1 decks
Meren of Clan Nel Toth
0.01% of 15123 decks 1 decks
High Synergy Cards
Phyrexian Altar
65% of 26 decks +61% synergy
Triskelion
58% of 26 decks +57% synergy
Altar of Dementia
46% of 26 decks +43% synergy
Murderous Redcap
44% of 9 decks +43% synergy
Cabal Coffers
50% of 26 decks +39% synergy
Viscera Seer
46% of 26 decks +37% synergy
Mayhem Devil
44% of 9 decks +35% synergy
Carrion Feeder
38% of 26 decks +33% synergy
Urborg, Tomb of Yawgmoth
42% of 26 decks +33% synergy
Yawgmoth, Thran Physician
36% of 25 decks +32% synergy
Top Cards
Blood Artist
42% of 26 decks +31% synergy
Solemn Simulacrum
38% of 26 decks +24% synergy
Feed the Swarm
36% of 22 decks +18% synergy
Pitiless Plunderer
35% of 26 decks +27% synergy
Gray Merchant of Asphodel
35% of 26 decks +26% synergy
Zulaport Cutthroat
35% of 26 decks +25% synergy
Skullclamp
35% of 26 decks +22% synergy
Phyrexian Arena
35% of 26 decks +20% synergy
Toxic Deluge
35% of 26 decks +17% synergy
Dark Ritual
35% of 26 decks +12% synergy
Creatures
Flamecache Gecko
100% of 3 decks +98% synergy
Walking Ballista
31% of 26 decks +28% synergy
Crypt Ghast
31% of 26 decks +26% synergy
Putrid Goblin
24% of 25 decks +23% synergy
Syr Konrad, the Grim
24% of 25 decks +15% synergy
Tatterkite
23% of 26 decks +23% synergy
Illuminor Szeras
21% of 19 decks +20% synergy
K'rrik, Son of Yawgmoth
20% of 25 decks +18% synergy
Drivnod, Carnage Dominus
20% of 15 decks +17% synergy
Ayara, First of Locthwain
20% of 25 decks +16% synergy
Workhorse
19% of 26 decks +19% synergy
Hangarback Walker
19% of 26 decks +18% synergy
Puppeteer Clique
19% of 26 decks +18% synergy
Disciple of the Vault
19% of 26 decks +17% synergy
Butcher of Malakir
19% of 26 decks +16% synergy
Reassembling Skeleton
19% of 26 decks +16% synergy
Cryptic Trilobite
17% of 24 decks +16% synergy
Lesser Masticore
16% of 25 decks +16% synergy
Grim Poppet
15% of 26 decks +15% synergy
Pentavus
15% of 26 decks +15% synergy
Pili-Pala
15% of 26 decks +15% synergy
Sidisi, Undead Vizier
15% of 26 decks +13% synergy
Myr Retriever
15% of 26 decks +13% synergy
Gravecrawler
15% of 26 decks +13% synergy
Yahenni, Undying Partisan
15% of 26 decks +12% synergy
Massacre Wurm
15% of 26 decks +11% synergy
Sheoldred, Whispering One
15% of 26 decks +11% synergy
Fain, the Broker
14% of 21 decks +13% synergy
Woe Strider
12% of 25 decks +10% synergy
Chainbreaker
12% of 26 decks +11% synergy
Scarecrone
12% of 26 decks +11% synergy
Arcbound Crusher
12% of 26 decks +11% synergy
Crystalline Crawler
12% of 26 decks +11% synergy
Arcbound Ravager
12% of 26 decks +11% synergy
Soldevi Adnate
12% of 26 decks +11% synergy
Hex Parasite
12% of 26 decks +11% synergy
Junk Diver
12% of 26 decks +11% synergy
Magus of the Coffers
12% of 26 decks +11% synergy
Steel Overseer
12% of 26 decks +10% synergy
Kokusho, the Evening Star
12% of 26 decks +10% synergy
Scrap Trawler
12% of 26 decks +10% synergy
Razaketh, the Foulblooded
12% of 26 decks +9% synergy
Pawn of Ulamog
12% of 26 decks +9% synergy
Marionette Master
12% of 26 decks +8% synergy
Grim Haruspex
12% of 26 decks +7% synergy
Burnished Hart
12% of 26 decks +7% synergy
Instants
Assassin's Trophy
60% of 5 decks +30% synergy
Vampiric Tutor
35% of 26 decks +16% synergy
Terminate
33% of 9 decks +12% synergy
Chaos Warp
33% of 9 decks +1% synergy
Village Rites
22% of 23 decks +12% synergy
Entomb
19% of 26 decks +12% synergy
Infernal Grasp
19% of 21 decks +12% synergy
Tragic Slip
15% of 26 decks +12% synergy
Go for the Throat
15% of 26 decks +8% synergy
Malakir Rebirth
14% of 22 decks +5% synergy
Deadly Rollick
12% of 24 decks +2% synergy
Defile
12% of 25 decks +9% synergy
Altar's Reap
12% of 26 decks +11% synergy
Sorceries
Demonic Tutor
46% of 26 decks +24% synergy
Faithless Looting
33% of 9 decks +17% synergy
Buried Alive
23% of 26 decks +17% synergy
Diabolic Tutor
23% of 26 decks +17% synergy
Victimize
23% of 26 decks +11% synergy
Reanimate
23% of 26 decks +7% synergy
Grim Tutor
19% of 26 decks +15% synergy
Damnation
19% of 26 decks +11% synergy
Their Name Is Death
16% of 19 decks +15% synergy
Torment of Hailfire
15% of 26 decks +10% synergy
Exsanguinate
15% of 26 decks +10% synergy
Diabolic Intent
15% of 26 decks +7% synergy
Night's Whisper
15% of 26 decks +6% synergy
Living Death
12% of 26 decks +6% synergy
Imperial Seal
12% of 26 decks +6% synergy
Sign in Blood
12% of 26 decks +2% synergy
Utility Artifacts
Lightning Greaves
31% of 26 decks +5% synergy
Swiftfoot Boots
31% of 26 decks +3% synergy
Bolas's Citadel
24% of 25 decks +15% synergy
Blasting Station
23% of 26 decks +23% synergy
Nim Deathmantle
23% of 26 decks +22% synergy
Krark-Clan Ironworks
23% of 26 decks +22% synergy
Clock of Omens
19% of 26 decks +18% synergy
Jet Medallion
15% of 26 decks +13% synergy
Panharmonicon
15% of 26 decks +11% synergy
Animation Module
12% of 26 decks +11% synergy
Mimic Vat
12% of 26 decks +10% synergy
Trading Post
12% of 26 decks +10% synergy
Altar of the Brood
12% of 26 decks +10% synergy
Unwinding Clock
12% of 26 decks +9% synergy
Hedron Archive
12% of 26 decks +9% synergy
Sensei's Divining Top
12% of 26 decks +6% synergy
Wayfarer's Bauble
12% of 26 decks +1% synergy
Enchantments
Warstorm Surge
33% of 9 decks +28% synergy
Goblin Bombardment
33% of 9 decks +27% synergy
Dictate of Erebos
23% of 26 decks +19% synergy
Animate Dead
23% of 26 decks +14% synergy
Black Market Connections
20% of 20 decks +9% synergy
Grave Pact
19% of 26 decks +15% synergy
Black Market
19% of 26 decks +15% synergy
Thran Vigil
18% of 17 decks +17% synergy
Bastion of Remembrance
17% of 23 decks +11% synergy
Biotransference
16% of 19 decks +15% synergy
Retribution of the Ancients
12% of 26 decks +11% synergy
Necropotence
12% of 26 decks +6% synergy
Planeswalkers
Liliana, Dreadhorde General
20% of 25 decks +16% synergy
Utility Lands
Phyrexian Tower
27% of 26 decks +18% synergy
Reliquary Tower
27% of 26 decks -3% synergy
Bojuka Bog
27% of 26 decks -3% synergy
Vault of Whispers
23% of 26 decks +19% synergy
Ancient Tomb
23% of 26 decks +13% synergy
Castle Locthwain
20% of 25 decks +15% synergy
Cabal Stronghold
19% of 26 decks +16% synergy
Takenuma, Abandoned Mire
19% of 21 decks +8% synergy
Inventors' Fair
15% of 26 decks +12% synergy
Urza's Saga
14% of 21 decks +7% synergy
Thespian's Stage
12% of 26 decks +9% synergy
High Market
12% of 26 decks +8% synergy
Command Beacon
12% of 26 decks +7% synergy
Buried Ruin
12% of 26 decks +6% synergy
Temple of the False God
12% of 26 decks +2% synergy
Rogue's Passage
12% of 26 decks -8% synergy
Mana Artifacts
Sol Ring
81% of 26 decks -4% synergy
Arcane Signet
48% of 25 decks -24% synergy
Mind Stone
27% of 26 decks +10% synergy
Sceptre of Eternal Glory
21% of 19 decks +20% synergy
Commander's Sphere
19% of 26 decks +4% synergy
Thought Vessel
19% of 26 decks +2% synergy
Fellwar Stone
19% of 26 decks -2% synergy
Gilded Lotus
15% of 26 decks +12% synergy
Thran Dynamo
15% of 26 decks +11% synergy
Liquimetal Torque
14% of 21 decks +11% synergy
Prismatic Lens
12% of 26 decks +10% synergy
Basalt Monolith
12% of 26 decks +9% synergy
Mana Vault
12% of 26 decks +5% synergy
Lands
Overgrown Tomb
80% of 5 decks +38% synergy
Command Tower
54% of 26 decks -20% synergy
Foreboding Ruins
44% of 9 decks +29% synergy
Smoldering Marsh
44% of 9 decks +12% synergy
Blood Crypt
44% of 9 decks +6% synergy
Dragonskull Summit
33% of 9 decks +2% synergy
Myriad Landscape
23% of 26 decks +4% synergy
Exotic Orchard
23% of 26 decks -12% synergy
Wooded Foothills
19% of 26 decks +9% synergy
Mana Confluence
15% of 26 decks +8% synergy
Polluted Delta
15% of 26 decks +4% synergy
Verdant Catacombs
15% of 26 decks +4% synergy
Gemstone Caverns
12% of 26 decks +7% synergy
Bloodstained Mire
12% of 26 decks +1% synergy
Arid Mesa
12% of 26 decks +1% synergy
Marsh Flats
12% of 26 decks +0% synergy
Misty Rainforest
12% of 26 decks -0% synergy
Evolving Wilds
12% of 26 decks -9% synergy