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 -1/-1 counters
Infinite death triggers
Infinite mill
Infinite sacrifice triggers
Infinite self-mill
Infinite recursion of non-Human creatures you control
Auntie Ool, Cursewretch
0.3%inclusion29 decks11.1K decks
The Reaper, King No More
0.5%inclusion17 decks3.57K decks
Top Commanders
Reaper King
0.0%inclusion2 decks8.03K decks
Ramos, Dragon Engine
0.0%inclusion1 decks10.9K decks
Eddie Brock
0.0%inclusion1 decks6.82K decks
Korvold, Fae-Cursed King
0.0%inclusion1 decks18.7K decks
New Cards
Sinister Gnarlbark
69%inclusion35 decks51 decks
67%synergy
Eirdu, Carrier of Dawn
67%inclusion2 decks3 decks
65%synergy
Dread Tiller
65%inclusion33 decks51 decks
61%synergy
Village Pillagers
51%inclusion26 decks51 decks
49%synergy
Grave Venerations
47%inclusion24 decks51 decks
45%synergy
High Synergy Cards
Blowfly Infestation
82%inclusion42 decks51 decks
81%synergy
Hapatra, Vizier of Poisons
80%inclusion41 decks51 decks
79%synergy
Black Sun's Zenith
80%inclusion41 decks51 decks
79%synergy
Yawgmoth, Thran Physician
78%inclusion40 decks51 decks
75%synergy
The Scorpion God
75%inclusion38 decks51 decks
74%synergy
Necroskitter
73%inclusion37 decks51 decks
72%synergy
Nest of Scarabs
71%inclusion36 decks51 decks
70%synergy
Devoted Druid
69%inclusion35 decks51 decks
66%synergy
Massacre Girl, Known Killer
67%inclusion34 decks51 decks
65%synergy
Ignoble Hierarch
86%inclusion44 decks51 decks
61%synergy
Top Cards
Assassin's Trophy
69%inclusion35 decks51 decks
38%synergy
Flourishing Defenses
61%inclusion31 decks51 decks
60%synergy
Everlasting Torment
61%inclusion31 decks51 decks
60%synergy
Persist
59%inclusion30 decks51 decks
57%synergy
Obelisk Spider
57%inclusion29 decks51 decks
55%synergy
Goblin Bombardment
57%inclusion29 decks51 decks
51%synergy
Phyrexian Altar
55%inclusion28 decks51 decks
51%synergy
Carnifex Demon
53%inclusion27 decks51 decks
52%synergy
Maha, Its Feathers Night
53%inclusion27 decks51 decks
51%synergy
Soul Snuffers
51%inclusion26 decks51 decks
50%synergy
Game Changers
Demonic Tutor
33%inclusion17 decks51 decks
14%synergy
Vampiric Tutor
27%inclusion14 decks51 decks
13%synergy
Worldly Tutor
24%inclusion12 decks51 decks
12%synergy
Ancient Tomb
16%inclusion8 decks51 decks
6%synergy
Necropotence
7.8%inclusion4 decks51 decks
3%synergy
Chrome Mox
7.8%inclusion4 decks51 decks
2%synergy
The One Ring
7.8%inclusion4 decks51 decks
0%synergy
Opposition Agent
5.9%inclusion3 decks51 decks
1%synergy
Gamble
5.9%inclusion3 decks51 decks
-3%synergy
Jeska's Will
5.9%inclusion3 decks51 decks
-9%synergy
Creatures
Luminous Broodmoth
100%inclusion3 decks3 decks
97%synergy
Murderous Redcap
51%inclusion26 decks51 decks
49%synergy
Grumgully, the Generous
51%inclusion26 decks51 decks
49%synergy
Blood Artist
51%inclusion26 decks51 decks
40%synergy
Channeler Initiate
49%inclusion25 decks51 decks
49%synergy
Kulrath Knight
49%inclusion25 decks51 decks
48%synergy
Birds of Paradise
49%inclusion25 decks51 decks
22%synergy
Generous Patron
43%inclusion22 decks51 decks
42%synergy
Persistent Constrictor
43%inclusion22 decks51 decks
42%synergy
Zulaport Cutthroat
43%inclusion22 decks51 decks
35%synergy
Scuzzback Scrounger
40%inclusion19 decks47 decks
39%synergy
Evolution Sage
37%inclusion19 decks51 decks
31%synergy
Viscera Seer
37%inclusion19 decks51 decks
29%synergy
Wickerbough Elder
35%inclusion18 decks51 decks
35%synergy
Putrid Goblin
35%inclusion18 decks51 decks
35%synergy
Rhys, the Evermore
33%inclusion1 decks3 decks
33%synergy
Dawnhand Dissident
31%inclusion16 decks51 decks
30%synergy
Oft-Nabbed Goat
31%inclusion16 decks51 decks
30%synergy
Quillspike
27%inclusion14 decks51 decks
27%synergy
Dusk Urchins
27%inclusion14 decks51 decks
27%synergy
Glissa Sunslayer
27%inclusion14 decks51 decks
22%synergy
Grim Poppet
25%inclusion13 decks51 decks
25%synergy
Skinrender
25%inclusion13 decks51 decks
25%synergy
Spitting Dilophosaurus
25%inclusion13 decks51 decks
25%synergy
Midnight Banshee
25%inclusion13 decks51 decks
25%synergy
Bloom Tender
25%inclusion13 decks51 decks
18%synergy
Auntie Ool, Cursewretch
24%inclusion12 decks51 decks
22%synergy
Delighted Halfling
24%inclusion12 decks51 decks
12%synergy
Puppeteer Clique
22%inclusion11 decks51 decks
20%synergy
Warren Soultrader
22%inclusion11 decks51 decks
16%synergy
Hexing Squelcher
22%inclusion11 decks51 decks
13%synergy
Tree of Perdition
20%inclusion10 decks51 decks
18%synergy
Carrion Feeder
20%inclusion10 decks51 decks
15%synergy
Harbinger of Night
18%inclusion9 decks51 decks
18%synergy
Banewhip Punisher
18%inclusion9 decks51 decks
17%synergy
Morbid Opportunist
18%inclusion9 decks51 decks
10%synergy
Pitiless Plunderer
16%inclusion8 decks51 decks
7%synergy
Llanowar Elves
16%inclusion8 decks51 decks
-5%synergy
Ammit Eternal
14%inclusion7 decks51 decks
14%synergy
Corrosive Mentor
14%inclusion7 decks51 decks
13%synergy
Walking Ballista
14%inclusion7 decks51 decks
11%synergy
Elves of Deep Shadow
14%inclusion7 decks51 decks
5%synergy
Moonshadow
13%inclusion6 decks47 decks
12%synergy
Rendclaw Trow
12%inclusion6 decks51 decks
12%synergy
Necrotic Ooze
12%inclusion6 decks51 decks
11%synergy
Metallic Mimic
12%inclusion6 decks51 decks
10%synergy
Protean Hulk
12%inclusion6 decks51 decks
10%synergy
Sephiroth, Fabled SOLDIER
12%inclusion6 decks51 decks
9%synergy
Shadow Urchin
11%inclusion5 decks47 decks
10%synergy
Scuzzback Marauders
10%inclusion5 decks51 decks
10%synergy
Instants
Terminate
41%inclusion21 decks51 decks
22%synergy
Personify
33%inclusion1 decks3 decks
32%synergy
Harmonized Crescendo
33%inclusion1 decks3 decks
31%synergy
Deflecting Swat
31%inclusion16 decks51 decks
15%synergy
Dark Ritual
31%inclusion16 decks51 decks
7%synergy
Heroic Intervention
31%inclusion16 decks51 decks
1%synergy
Fire Covenant
27%inclusion14 decks51 decks
25%synergy
Putrefy
25%inclusion13 decks51 decks
9%synergy
Atomize
24%inclusion12 decks51 decks
20%synergy
Malakir Rebirth
24%inclusion12 decks51 decks
15%synergy
Deadly Rollick
24%inclusion12 decks51 decks
10%synergy
Beast Within
24%inclusion12 decks51 decks
-10%synergy
Saw in Half
22%inclusion11 decks51 decks
17%synergy
Infernal Grasp
22%inclusion11 decks51 decks
14%synergy
Abrupt Decay
22%inclusion11 decks51 decks
12%synergy
Grim Affliction
20%inclusion10 decks51 decks
19%synergy
Entomb
20%inclusion10 decks51 decks
13%synergy
Noxious Revival
18%inclusion9 decks51 decks
13%synergy
Culling the Weak
16%inclusion8 decks51 decks
11%synergy
Burnt Offering
14%inclusion7 decks51 decks
12%synergy
Sudden Spoiling
12%inclusion6 decks51 decks
10%synergy
Revitalizing Repast
12%inclusion6 decks51 decks
3%synergy
Fell the Profane
12%inclusion6 decks51 decks
3%synergy
Veil of Summer
10%inclusion5 decks51 decks
5%synergy
Sacrifice
7.8%inclusion4 decks51 decks
7%synergy
Redirect Lightning
7.8%inclusion4 decks51 decks
2%synergy
Chaos Warp
7.8%inclusion4 decks51 decks
-22%synergy
First Day of Class
5.9%inclusion3 decks51 decks
6%synergy
Force of Vigor
5.9%inclusion3 decks51 decks
3%synergy
Chord of Calling
5.9%inclusion3 decks51 decks
1%synergy
Pyroblast
5.9%inclusion3 decks51 decks
0%synergy
Untimely Malfunction
5.9%inclusion3 decks51 decks
-2%synergy
Village Rites
5.9%inclusion3 decks51 decks
-3%synergy
Sorceries
Reanimate
47%inclusion24 decks51 decks
28%synergy
Nature's Lore
33%inclusion17 decks51 decks
2%synergy
Aberrant Return
31%inclusion16 decks51 decks
30%synergy
Toxic Deluge
31%inclusion16 decks51 decks
13%synergy
Farseek
31%inclusion16 decks51 decks
-5%synergy
Eldritch Evolution
27%inclusion14 decks51 decks
23%synergy
Three Visits
27%inclusion14 decks51 decks
3%synergy
Diabolic Intent
24%inclusion12 decks51 decks
16%synergy
Soul Immolation
19%inclusion9 decks47 decks
18%synergy
Incremental Blight
18%inclusion9 decks51 decks
17%synergy
Night's Whisper
16%inclusion8 decks51 decks
6%synergy
Victimize
16%inclusion8 decks51 decks
3%synergy
Blasphemous Act
16%inclusion8 decks51 decks
-18%synergy
Eventide's Shadow
14%inclusion7 decks51 decks
12%synergy
Rampant Growth
14%inclusion7 decks51 decks
-19%synergy
Cultivate
14%inclusion7 decks51 decks
-29%synergy
Darkness Descends
12%inclusion6 decks49 decks
12%synergy
Buried Alive
12%inclusion6 decks51 decks
6%synergy
Chain Reaction
10%inclusion5 decks51 decks
6%synergy
Damnation
10%inclusion5 decks51 decks
3%synergy
Kodama's Reach
10%inclusion5 decks51 decks
-17%synergy
Burning Curiosity
7.8%inclusion4 decks51 decks
7%synergy
Molten Duplication
7.8%inclusion4 decks51 decks
6%synergy
Profane Tutor
7.8%inclusion4 decks51 decks
6%synergy
Insatiable Avarice
7.8%inclusion4 decks51 decks
5%synergy
Bogslither's Embrace
6.4%inclusion3 decks47 decks
6%synergy
Lively Dirge
5.9%inclusion3 decks51 decks
4%synergy
Peer into the Abyss
5.9%inclusion3 decks51 decks
3%synergy
Grim Tutor
5.9%inclusion3 decks51 decks
2%synergy
Nature's Rhythm
5.9%inclusion3 decks51 decks
2%synergy
Finale of Devastation
5.9%inclusion3 decks51 decks
-2%synergy
Culling Ritual
5.9%inclusion3 decks51 decks
-5%synergy
Faithless Looting
5.9%inclusion3 decks51 decks
-10%synergy
Utility Artifacts
Ashnod's Altar
41%inclusion21 decks51 decks
35%synergy
Contagion Clasp
27%inclusion14 decks51 decks
26%synergy
Contagion Engine
20%inclusion10 decks51 decks
19%synergy
Skullclamp
20%inclusion10 decks51 decks
8%synergy
Blasting Station
14%inclusion7 decks51 decks
13%synergy
Birthing Pod
14%inclusion7 decks51 decks
12%synergy
Cauldron of Souls
12%inclusion6 decks51 decks
11%synergy
Chimil, the Inner Sun
12%inclusion6 decks51 decks
10%synergy
The Great Henge
12%inclusion6 decks51 decks
2%synergy
Conjurer's Closet
10%inclusion5 decks51 decks
7%synergy
Wishclaw Talisman
10%inclusion5 decks51 decks
5%synergy
Lightning Greaves
10%inclusion5 decks51 decks
-15%synergy
Luxior, Giada's Gift
5.9%inclusion3 decks51 decks
5%synergy
Enchantments
Rhythm of the Wild
39%inclusion20 decks51 decks
18%synergy
All Will Be One
33%inclusion17 decks51 decks
31%synergy
Crumbling Ashes
31%inclusion16 decks51 decks
31%synergy
Animate Dead
24%inclusion12 decks51 decks
15%synergy
Bastion of Remembrance
22%inclusion11 decks51 decks
15%synergy
The Meathook Massacre
16%inclusion8 decks51 decks
11%synergy
Innkeeper's Talent
14%inclusion7 decks51 decks
9%synergy
Puca's Covenant
12%inclusion6 decks51 decks
10%synergy
Grave Pact
12%inclusion6 decks51 decks
7%synergy
Thran Vigil
10%inclusion5 decks51 decks
9%synergy
Lasting Tarfire
10%inclusion5 decks51 decks
8%synergy
Black Market Connections
10%inclusion5 decks51 decks
-2%synergy
Boggart Mischief
7.8%inclusion4 decks51 decks
7%synergy
Dictate of Erebos
7.8%inclusion4 decks51 decks
5%synergy
Phyrexian Reclamation
7.8%inclusion4 decks51 decks
5%synergy
Sylvan Library
7.8%inclusion4 decks51 decks
-1%synergy
Impact Tremors
7.8%inclusion4 decks51 decks
-2%synergy
Funeral Room // Awakening Hall
5.9%inclusion3 decks51 decks
4%synergy
Hollowmurk Siege
5.9%inclusion3 decks51 decks
3%synergy
Ripples of Undeath
5.9%inclusion3 decks51 decks
1%synergy
Guardian Project
5.9%inclusion3 decks51 decks
-2%synergy
Planeswalkers
Vraska, Betrayal's Sting
22%inclusion11 decks51 decks
19%synergy
Utility Lands
Nesting Grounds
53%inclusion27 decks51 decks
51%synergy
Urborg, Tomb of Yawgmoth
39%inclusion20 decks51 decks
30%synergy
Yavimaya, Cradle of Growth
31%inclusion16 decks51 decks
23%synergy
Phyrexian Tower
22%inclusion11 decks51 decks
13%synergy
Shifting Woodland
20%inclusion10 decks51 decks
13%synergy
Boseiju, Who Endures
20%inclusion10 decks51 decks
1%synergy
Ifnir Deadlands
16%inclusion8 decks51 decks
15%synergy
Karn's Bastion
16%inclusion8 decks51 decks
11%synergy
Reliquary Tower
16%inclusion8 decks51 decks
-14%synergy
Bojuka Bog
12%inclusion6 decks51 decks
-18%synergy
Takenuma, Abandoned Mire
10%inclusion5 decks51 decks
1%synergy
Cabal Coffers
10%inclusion5 decks51 decks
0%synergy
Volrath's Stronghold
5.9%inclusion3 decks51 decks
5%synergy
Mana Artifacts
Arcane Signet
90%inclusion46 decks51 decks
18%synergy
Sol Ring
88%inclusion45 decks51 decks
5%synergy
Wickersmith's Tools
31%inclusion16 decks51 decks
31%synergy
Talisman of Resilience
24%inclusion12 decks51 decks
11%synergy
Fellwar Stone
24%inclusion12 decks51 decks
3%synergy
Talisman of Indulgence
20%inclusion10 decks51 decks
-8%synergy
The Soul Stone
16%inclusion8 decks51 decks
12%synergy
Talisman of Impulse
12%inclusion6 decks51 decks
1%synergy
Golgari Signet
10%inclusion5 decks51 decks
0%synergy
Rakdos Signet
7.8%inclusion4 decks51 decks
-17%synergy
Staff of Compleation
5.9%inclusion3 decks51 decks
5%synergy
Lotus Petal
5.9%inclusion3 decks51 decks
-1%synergy
Thought Vessel
5.9%inclusion3 decks51 decks
-12%synergy
Lands
Hallowed Fountain
100%inclusion3 decks3 decks
60%synergy
Watery Grave
100%inclusion3 decks3 decks
58%synergy
Command Tower
92%inclusion47 decks51 decks
18%synergy
Blood Crypt
75%inclusion38 decks51 decks
37%synergy
Overgrown Tomb
75%inclusion38 decks51 decks
33%synergy
Stomping Ground
67%inclusion34 decks51 decks
25%synergy
Woodland Cemetery
55%inclusion28 decks51 decks
23%synergy
Wooded Foothills
53%inclusion27 decks51 decks
42%synergy
Verdant Catacombs
51%inclusion26 decks51 decks
40%synergy
Undergrowth Stadium
51%inclusion26 decks51 decks
28%synergy
Exotic Orchard
51%inclusion26 decks51 decks
14%synergy
Bloodstained Mire
49%inclusion25 decks51 decks
38%synergy
Dragonskull Summit
45%inclusion23 decks51 decks
10%synergy
Spire Garden
43%inclusion22 decks51 decks
21%synergy
Luxury Suite
43%inclusion22 decks51 decks
19%synergy
Ziatora's Proving Ground
43%inclusion22 decks51 decks
16%synergy
Llanowar Wastes
43%inclusion22 decks51 decks
16%synergy
Rootbound Crag
43%inclusion22 decks51 decks
15%synergy
Smoldering Marsh
43%inclusion22 decks51 decks
9%synergy
Sulfurous Springs
37%inclusion19 decks51 decks
14%synergy
Cinder Glade
37%inclusion19 decks51 decks
-1%synergy
Vernal Fen
35%inclusion18 decks51 decks
26%synergy
Karplusan Forest
33%inclusion17 decks51 decks
13%synergy
Fabled Passage
31%inclusion16 decks51 decks
22%synergy
Savage Lands
27%inclusion14 decks51 decks
6%synergy
City of Brass
22%inclusion11 decks51 decks
14%synergy
Deathcap Glade
22%inclusion11 decks51 decks
8%synergy
Haunted Ridge
22%inclusion11 decks51 decks
5%synergy
Path of Ancestry
22%inclusion11 decks51 decks
-1%synergy
Rockfall Vale
20%inclusion10 decks51 decks
-1%synergy
Marsh Flats
18%inclusion9 decks51 decks
7%synergy
Twilight Mire
18%inclusion9 decks51 decks
4%synergy
Evolving Wilds
18%inclusion9 decks51 decks
-3%synergy
Mana Confluence
16%inclusion8 decks51 decks
9%synergy
Underground Mortuary
16%inclusion8 decks51 decks
3%synergy
Scalding Tarn
14%inclusion7 decks51 decks
3%synergy
Windswept Heath
14%inclusion7 decks51 decks
3%synergy
Polluted Delta
14%inclusion7 decks51 decks
2%synergy
Terramorphic Expanse
14%inclusion7 decks51 decks
-1%synergy
Riveteers Overlook
12%inclusion6 decks51 decks
10%synergy
Prismatic Vista
12%inclusion6 decks51 decks
7%synergy
Reflecting Pool
12%inclusion6 decks51 decks
7%synergy
Wastewood Verge
12%inclusion6 decks51 decks
4%synergy
Thornspire Verge
12%inclusion6 decks51 decks
3%synergy
Graven Cairns
12%inclusion6 decks51 decks
2%synergy
Raucous Theater
12%inclusion6 decks51 decks
2%synergy
Misty Rainforest
12%inclusion6 decks51 decks
0%synergy
Badlands
12%inclusion6 decks51 decks
-1%synergy
Bayou
12%inclusion6 decks51 decks
-2%synergy
Forbidden Orchard
10%inclusion5 decks51 decks
8%synergy