Mikaeus, the Unhallowed
Altar of Dementia
The Reaper, King No More

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (The Reaper without a +1/+1 counter on it on the battlefield).

   Steps

How does this combo work?
1
Activate Altar of Dementia by sacrificing The Reaper.
2
When The Reaper dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3
When The Reaper enters the battlefield, it triggers, putting a -1/-1 counter on it.
4
Resolve the Altar of Dementia ability
5
Repeat.

   Results

What do I get from this combo?
Infinite ETB
Infinite LTB
Infinite death triggers
Infinite mill
Infinite sacrifice triggers
Infinite self-mill
Infinite -1/-1 counters
Infinite recursion of non-Human creatures you control
Auntie Ool, Cursewretch
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The Reaper, King No More
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Ramos, Dragon Engine
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Korvold, Fae-Cursed King
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High Synergy Cards
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Top Cards
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Utility Artifacts
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Cauldron of Souls
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13%synergy
Blasting Station
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Wishclaw Talisman
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The Great Henge
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Enchantments
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Rhythm of the Wild
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11%synergy
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31%synergy
All Will Be One
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19%synergy
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The Meathook Massacre
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11%synergy
Innkeeper's Talent
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9%synergy
Sylvan Library
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Puca's Covenant
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Lasting Tarfire
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Ripples of Undeath
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Underworld Breach
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Boggart Mischief
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Planeswalkers
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Utility Lands
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Yavimaya, Cradle of Growth
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22%synergy
Boseiju, Who Endures
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Shifting Woodland
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16%synergy
Phyrexian Tower
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Reliquary Tower
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Ifnir Deadlands
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Takenuma, Abandoned Mire
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Cabal Coffers
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Mana Artifacts
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18%synergy
Sol Ring
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27%synergy
Fellwar Stone
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Talisman of Resilience
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1%synergy
Thought Vessel
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-11%synergy
Rakdos Signet
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-17%synergy
Lands
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58%synergy
Command Tower
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Blood Crypt
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Stomping Ground
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28%synergy
Wooded Foothills
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47%synergy
Verdant Catacombs
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43%synergy
Bloodstained Mire
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43%synergy
Undergrowth Stadium
52%inclusion32 decks61 decks
29%synergy
Exotic Orchard
52%inclusion32 decks61 decks
16%synergy
Woodland Cemetery
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18%synergy
Spire Garden
46%inclusion28 decks61 decks
24%synergy
Luxury Suite
44%inclusion27 decks61 decks
21%synergy
Ziatora's Proving Ground
41%inclusion25 decks61 decks
15%synergy
Smoldering Marsh
41%inclusion25 decks61 decks
7%synergy
Llanowar Wastes
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12%synergy
Rootbound Crag
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11%synergy
Dragonskull Summit
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4%synergy
Sulfurous Springs
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11%synergy
Cinder Glade
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-4%synergy
Vernal Fen
31%inclusion19 decks61 decks
21%synergy
Karplusan Forest
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11%synergy
Fabled Passage
30%inclusion18 decks61 decks
20%synergy
Savage Lands
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6%synergy
Haunted Ridge
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8%synergy
City of Brass
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15%synergy
Deathcap Glade
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10%synergy
Mana Confluence
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14%synergy
Rockfall Vale
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1%synergy
Path of Ancestry
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Marsh Flats
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7%synergy
Polluted Delta
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6%synergy
Twilight Mire
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3%synergy
Evolving Wilds
16%inclusion10 decks61 decks
-4%synergy
Windswept Heath
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4%synergy
Starting Town
13%inclusion8 decks61 decks
11%synergy
Wastewood Verge
13%inclusion8 decks61 decks
6%synergy
Thornspire Verge
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4%synergy
Scalding Tarn
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2%synergy
Blazemire Verge
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2%synergy
Underground Mortuary
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Taiga
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0%synergy
Badlands
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0%synergy
Bayou
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0%synergy
Terramorphic Expanse
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-2%synergy
Forbidden Orchard
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8%synergy
Prismatic Vista
10%inclusion6 decks61 decks
5%synergy
Nurturing Peatland
10%inclusion6 decks61 decks
5%synergy
Reflecting Pool
10%inclusion6 decks61 decks
5%synergy