Mikaeus, the Unhallowed + Deathbringer Thoctar + Ashnod's Altar

Mikaeus, the Unhallowed
Deathbringer Thoctar
Ashnod's Altar

Requires
Mikaeus, the Unhallowed must be on the battlefield. Deathbringer Thoctar must be on the battlefield. Ashnod's Altar must be on the battlefield.
Steps
  1. Activate Deathbringer Thoctar by removing a +1/+1 counter from it, dealing 1 damage to any target.
  2. Repeat step 1 until Deathbringer Thoctar has no +1/+1 counters on it.
  3. Activate Ashnod's Altar by sacrificing Deathbringer Thoctar, adding .
  4. Deathbringer Thoctar dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  5. Repeat.
Results
Infinite colorless mana. Infinite damage. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

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Evolutionary Leap
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Survival of the Fittest
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8% of 38 decks +5% synergy
Journey to Eternity
8% of 38 decks +4% synergy
Growing Rites of Itlimoc
8% of 38 decks +2% synergy
Planeswalkers
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8% of 196 decks +6% synergy
Nicol Bolas, Planeswalker
7% of 103 decks +4% synergy
Geyadrone Dihada
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Tevesh Szat, Doom of Fools
6% of 185 decks +5% synergy
Liliana, Untouched by Death
6% of 193 decks +5% synergy
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Urborg, Tomb of Yawgmoth
41% of 199 decks +31% synergy
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Bojuka Bog
39% of 199 decks +8% synergy
Boseiju, Who Endures
25% of 36 decks +5% synergy
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Kessig Wolf Run
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High Market
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Temple of the False God
18% of 199 decks +8% synergy
Cabal Coffers
18% of 199 decks +7% synergy
Field of the Dead
15% of 192 decks +12% synergy
Takenuma, Abandoned Mire
14% of 174 decks +3% synergy
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12% of 199 decks +1% synergy
Rogue's Passage
12% of 199 decks -7% synergy
Forge of Heroes
11% of 193 decks +10% synergy
Volrath's Stronghold
11% of 199 decks +9% synergy
Grim Backwoods
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11% of 95 decks +6% synergy
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9% of 199 decks +6% synergy
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Mortuary Mire
6% of 198 decks +1% synergy
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5% of 183 decks -2% synergy
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5% of 191 decks -0% synergy
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5% of 197 decks +0% synergy
Crypt of Agadeem
5% of 199 decks +3% synergy
Strip Mine
5% of 199 decks +2% synergy
Buried Ruin
5% of 199 decks -0% synergy
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86% of 199 decks +1% synergy
Arcane Signet
72% of 191 decks +0% synergy
Dimir Signet
49% of 103 decks +18% synergy
Rakdos Signet
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Talisman of Indulgence
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Talisman of Creativity
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Crowded Crypt
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Thought Vessel
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Mind Stone
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Gruul Signet
8% of 38 decks -4% synergy
Golgari Signet
8% of 38 decks -5% synergy
Mana Crypt
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Obelisk of Grixis
6% of 103 decks +5% synergy
Lands
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85% of 199 decks +11% synergy
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71% of 35 decks +39% synergy
Godless Shrine
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71% of 7 decks +44% synergy
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68% of 38 decks +26% synergy
Blood Crypt
64% of 199 decks +25% synergy
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Dragonskull Summit
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Woodland Cemetery
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49% of 103 decks +9% synergy
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Bloodstained Mire
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Battlefield Forge
43% of 7 decks +18% synergy
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43% of 7 decks +15% synergy
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43% of 7 decks +15% synergy
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43% of 7 decks +15% synergy
Undergrowth Stadium
42% of 38 decks +16% synergy
Savage Lands
39% of 38 decks +16% synergy
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37% of 103 decks +10% synergy
Spire Garden
37% of 38 decks +13% synergy
Morphic Pool
36% of 99 decks +10% synergy
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36% of 103 decks +6% synergy
Sulfurous Springs
36% of 199 decks +16% synergy
Sunken Hollow
35% of 102 decks +1% synergy
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35% of 103 decks +16% synergy
Rootbound Crag
34% of 38 decks +11% synergy
Cinder Glade
34% of 38 decks -4% synergy
Exotic Orchard
34% of 199 decks -2% synergy
Commercial District
33% of 12 decks +21% synergy
Graven Cairns
33% of 199 decks +25% synergy
Haunted Ridge
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Underground Mortuary
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Training Center
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24% of 38 decks +11% synergy
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24% of 38 decks +10% synergy
Karplusan Forest
24% of 38 decks +7% synergy
Llanowar Wastes
24% of 38 decks -2% synergy
Scalding Tarn
24% of 199 decks +13% synergy
Evolving Wilds
23% of 199 decks +2% synergy
Polluted Delta
23% of 199 decks +11% synergy
Rakdos Carnarium
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Temple of Deceit
22% of 103 decks +6% synergy