Underworld Breach
Altar of Dementia
Cathodion

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.

   Steps

How does this combo work?
1
Activate Altar of Dementia by sacrificing Cathodion.
2
Cathodion triggers, adding .
3
Resolve the Altar of Dementia ability, causing yourself to mill cards equal to Cathodion's power.
4
Cast Cathodion from your graveyard for its escape cost by paying 3 and exiling three cards from your graveyard.
5
Repeat.

   Results

What do I get from this combo?
Infinite self-mill
Near-infinite death triggers
Near-infinite ETB
Near-infinite LTB
Near-infinite sacrifice triggers
Near-infinite storm count
Rakdos, the Muscle
1.0%inclusion56 decks5.54K decks
Garna, the Bloodflame
3.3%inclusion8 decks244 decks
Gerrard, Weatherlight Hero
0.6%inclusion3 decks491 decks
Herigast, Erupting Nullkite
0.1%inclusion3 decks4.37K decks
Koll, the Forgemaster
0.2%inclusion3 decks1.23K decks
Birgi, God of Storytelling
0.1%inclusion2 decks1.46K decks
Dargo, the Shipwrecker // Silas Renn, Seeker Adept
0.4%inclusion2 decks537 decks
Dargo, the Shipwrecker // Tevesh Szat, Doom of Fools
0.4%inclusion2 decks474 decks
Flubs, the Fool
0.0%inclusion1 decks19.4K decks
Deadpool, Trading Card
0.0%inclusion1 decks13K decks
The Locust God
0.0%inclusion1 decks6.41K decks
Kefka, Court Mage
0.0%inclusion1 decks18.3K decks
Grenzo, Dungeon Warden
0.0%inclusion1 decks4.12K decks
Zinnia, Valley's Voice
0.0%inclusion1 decks15.1K decks
Arbaaz Mir
0.1%inclusion1 decks1.65K decks
Urabrask
0.0%inclusion1 decks3.65K decks
Dargo, the Shipwrecker // Tymna the Weaver
0.1%inclusion1 decks1.44K decks
Wolverine, Best There Is
0.0%inclusion1 decks9.69K decks
New Cards
Aang's Iceberg
33%inclusion1 decks3 decks
33%synergy
The Last Agni Kai
17%inclusion4 decks23 decks
13%synergy
Redirect Lightning
9.1%inclusion4 decks44 decks
4%synergy
Desperate Plea
4.8%inclusion1 decks21 decks
4%synergy
Callous Inspector
4.5%inclusion1 decks22 decks
4%synergy
High Synergy Cards
Priest of Gix
76%inclusion64 decks84 decks
76%synergy
Culling the Weak
79%inclusion66 decks84 decks
74%synergy
Burnt Offering
75%inclusion63 decks84 decks
73%synergy
Warren Soultrader
78%inclusion64 decks82 decks
73%synergy
Sacrifice
73%inclusion61 decks84 decks
72%synergy
Cabal Ritual
75%inclusion63 decks84 decks
70%synergy
Shriekmaw
71%inclusion60 decks84 decks
70%synergy
Ashnod's Altar
74%inclusion82 decks111 decks
67%synergy
Viscera Seer
74%inclusion62 decks84 decks
66%synergy
Poxwalkers
65%inclusion55 decks84 decks
65%synergy
Top Cards
Dark Ritual
86%inclusion72 decks84 decks
61%synergy
Swords to Plowshares
78%inclusion14 decks18 decks
16%synergy
Reanimate
76%inclusion64 decks84 decks
57%synergy
Diabolic Intent
73%inclusion61 decks84 decks
65%synergy
Phyrexian Altar
68%inclusion76 decks111 decks
65%synergy
Brain Freeze
67%inclusion8 decks12 decks
63%synergy
Entomb
67%inclusion56 decks84 decks
60%synergy
Lotho, Corrupt Shirriff
67%inclusion4 decks6 decks
53%synergy
Birds of Paradise
67%inclusion4 decks6 decks
39%synergy
Path to Exile
67%inclusion12 decks18 decks
20%synergy
Game Changers
Demonic Tutor
71%inclusion60 decks84 decks
52%synergy
Vampiric Tutor
68%inclusion57 decks84 decks
53%synergy
Ancient Tomb
60%inclusion67 decks111 decks
51%synergy
Gamble
59%inclusion65 decks111 decks
50%synergy
Thassa's Oracle
58%inclusion7 decks12 decks
52%synergy
Mana Vault
57%inclusion63 decks111 decks
51%synergy
Chrome Mox
56%inclusion62 decks111 decks
50%synergy
Orcish Bowmasters
50%inclusion42 decks84 decks
41%synergy
Necropotence
49%inclusion41 decks84 decks
44%synergy
Lion's Eye Diamond
49%inclusion54 decks111 decks
47%synergy
Creatures
Ignoble Hierarch
75%inclusion3 decks4 decks
51%synergy
Forsaken Miner
64%inclusion53 decks83 decks
63%synergy
Grief
63%inclusion53 decks84 decks
63%synergy
Golgari Thug
62%inclusion52 decks84 decks
61%synergy
Grand Abolisher
61%inclusion11 decks18 decks
52%synergy
Blood Pet
61%inclusion51 decks84 decks
60%synergy
K'rrik, Son of Yawgmoth
61%inclusion51 decks84 decks
58%synergy
Priest of Urabrask
60%inclusion67 decks111 decks
60%synergy
Greedy Freebooter
60%inclusion50 decks84 decks
58%synergy
Reckless Barbarian
59%inclusion65 decks111 decks
58%synergy
Esper Sentinel
56%inclusion10 decks18 decks
36%synergy
Shambling Ghast
54%inclusion45 decks84 decks
53%synergy
Ingot Chewer
53%inclusion59 decks111 decks
53%synergy
Impulsive Pilferer
53%inclusion59 decks111 decks
51%synergy
Umbral Collar Zealot
52%inclusion25 decks48 decks
49%synergy
Fury
50%inclusion56 decks111 decks
49%synergy
Simian Spirit Guide
50%inclusion56 decks111 decks
45%synergy
Ragavan, Nimble Pilferer
50%inclusion56 decks111 decks
43%synergy
Elvish Spirit Guide
50%inclusion3 decks6 decks
46%synergy
Eternal Witness
50%inclusion3 decks6 decks
33%synergy
Mindslicer
49%inclusion41 decks84 decks
48%synergy
Boggart Trawler
48%inclusion39 decks82 decks
44%synergy
Birgi, God of Storytelling
47%inclusion52 decks111 decks
41%synergy
Sephiroth, Fabled SOLDIER
45%inclusion30 decks66 decks
43%synergy
Pinnacle Monk
45%inclusion48 decks107 decks
40%synergy
Recruiter of the Guard
44%inclusion8 decks18 decks
42%synergy
Archivist of Oghma
44%inclusion8 decks18 decks
40%synergy
Dargo, the Shipwrecker
44%inclusion49 decks111 decks
44%synergy
Dualcaster Mage
44%inclusion49 decks111 decks
40%synergy
Blood Artist
44%inclusion37 decks84 decks
33%synergy
Timeline Culler
43%inclusion21 decks49 decks
42%synergy
Laboratory Maniac
42%inclusion5 decks12 decks
37%synergy
Pitiless Plunderer
42%inclusion35 decks84 decks
33%synergy
Party Thrasher
39%inclusion42 decks107 decks
38%synergy
Ranger-Captain of Eos
39%inclusion7 decks18 decks
35%synergy
Drannith Magistrate
39%inclusion7 decks18 decks
34%synergy
Deadpool, Trading Card
37%inclusion26 decks70 decks
35%synergy
Flamekin Harbinger
36%inclusion40 decks111 decks
36%synergy
Oswald Fiddlebender
33%inclusion6 decks18 decks
32%synergy
Skittering Precursor
31%inclusion33 decks107 decks
31%synergy
Charming Scoundrel
28%inclusion31 decks111 decks
27%synergy
Imperial Recruiter
28%inclusion31 decks111 decks
23%synergy
Carrion Feeder
27%inclusion23 decks84 decks
23%synergy
Atsushi, the Blazing Sky
26%inclusion29 decks111 decks
24%synergy
Emry, Lurker of the Loch
25%inclusion3 decks12 decks
21%synergy
Mayhem Devil
25%inclusion21 decks84 decks
15%synergy
Goblin Engineer
23%inclusion26 decks111 decks
21%synergy
Hoarding Broodlord
23%inclusion19 decks84 decks
21%synergy
Loyal Retainers
22%inclusion4 decks18 decks
22%synergy
Teshar, Ancestor's Apostle
22%inclusion4 decks18 decks
20%synergy
Instants
Assassin's Trophy
75%inclusion3 decks4 decks
45%synergy
Red Elemental Blast
64%inclusion71 decks111 decks
58%synergy
Saw in Half
63%inclusion53 decks84 decks
59%synergy
Pyroblast
60%inclusion67 decks111 decks
55%synergy
Swan Song
58%inclusion7 decks12 decks
41%synergy
An Offer You Can't Refuse
58%inclusion7 decks12 decks
34%synergy
Deflecting Swat
58%inclusion64 decks111 decks
41%synergy
Flare of Duplication
56%inclusion60 decks107 decks
53%synergy
Deadly Rollick
54%inclusion45 decks84 decks
40%synergy
Silence
50%inclusion9 decks18 decks
44%synergy
Pact of Negation
50%inclusion6 decks12 decks
43%synergy
Crop Rotation
50%inclusion3 decks6 decks
40%synergy
Worldly Tutor
50%inclusion3 decks6 decks
38%synergy
Mystical Tutor
50%inclusion6 decks12 decks
38%synergy
Songs of the Damned
45%inclusion38 decks84 decks
44%synergy
Enlightened Tutor
44%inclusion8 decks18 decks
29%synergy
Frantic Search
42%inclusion5 decks12 decks
27%synergy
Counterspell
42%inclusion5 decks12 decks
0%synergy
Spell Pierce
33%inclusion4 decks12 decks
30%synergy
Borne Upon a Wind
33%inclusion4 decks12 decks
29%synergy
Flusterstorm
33%inclusion4 decks12 decks
26%synergy
Force of Negation
33%inclusion4 decks12 decks
25%synergy
Fierce Guardianship
33%inclusion4 decks12 decks
16%synergy
Flare of Malice
27%inclusion22 decks82 decks
24%synergy
Mindbreak Trap
25%inclusion3 decks12 decks
20%synergy
Mental Misstep
25%inclusion3 decks12 decks
19%synergy
Snap
25%inclusion3 decks12 decks
17%synergy
Force of Will
25%inclusion3 decks12 decks
15%synergy
Cyclonic Rift
25%inclusion3 decks12 decks
2%synergy
Untimely Malfunction
23%inclusion23 decks101 decks
15%synergy
Chaos Warp
20%inclusion22 decks111 decks
-10%synergy
Second Sunrise
17%inclusion3 decks18 decks
16%synergy
Wear // Tear
17%inclusion3 decks18 decks
10%synergy
Teferi's Protection
17%inclusion3 decks18 decks
0%synergy
Tibalt's Trickery
16%inclusion18 decks111 decks
11%synergy
Deadly Dispute
15%inclusion13 decks84 decks
3%synergy
Lightning Bolt
14%inclusion16 decks111 decks
3%synergy
Withering Torment
14%inclusion11 decks80 decks
6%synergy
Final Fortune
12%inclusion13 decks111 decks
10%synergy
Desperate Ritual
12%inclusion13 decks111 decks
9%synergy
Pyretic Ritual
11%inclusion12 decks111 decks
8%synergy
Abrade
11%inclusion12 decks111 decks
-1%synergy
Imp's Mischief
11%inclusion9 decks84 decks
7%synergy
Seething Song
10%inclusion11 decks111 decks
4%synergy
Tainted Pact
8.3%inclusion7 decks84 decks
5%synergy
Fell the Profane
7.3%inclusion6 decks82 decks
-2%synergy
Bolt Bend
7.2%inclusion8 decks111 decks
3%synergy
Mausoleum Secrets
6.0%inclusion5 decks84 decks
6%synergy
Corrupted Conviction
6.0%inclusion5 decks84 decks
1%synergy
Valakut Awakening
5.4%inclusion6 decks111 decks
0%synergy
Sorceries
Sevinne's Reclamation
61%inclusion11 decks18 decks
54%synergy
Infernal Plunge
56%inclusion62 decks111 decks
55%synergy
Rite of Flame
54%inclusion60 decks111 decks
50%synergy
Eldritch Evolution
50%inclusion3 decks6 decks
46%synergy
Imperial Seal
44%inclusion37 decks84 decks
39%synergy
Jeska's Will
43%inclusion48 decks111 decks
28%synergy
Molten Duplication
32%inclusion35 decks109 decks
30%synergy
Windfall
25%inclusion3 decks12 decks
13%synergy
Wheel of Fortune
23%inclusion26 decks111 decks
19%synergy
Cabal Therapy
23%inclusion19 decks84 decks
23%synergy
Faithless Looting
23%inclusion25 decks111 decks
6%synergy
Grim Tutor
21%inclusion18 decks84 decks
17%synergy
Buried Alive
19%inclusion16 decks84 decks
13%synergy
Open the Armory
17%inclusion3 decks18 decks
12%synergy
Blasphemous Act
14%inclusion15 decks111 decks
-20%synergy
Lively Dirge
11%inclusion9 decks83 decks
9%synergy
Twinflame
10%inclusion11 decks111 decks
7%synergy
Grapeshot
10%inclusion11 decks111 decks
6%synergy
Living Death
10%inclusion8 decks84 decks
4%synergy
Feed the Swarm
10%inclusion8 decks84 decks
-7%synergy
Praetor's Grasp
8.3%inclusion7 decks84 decks
6%synergy
Beseech the Mirror
8.3%inclusion7 decks84 decks
5%synergy
Victimize
8.3%inclusion7 decks84 decks
-4%synergy
Toxic Deluge
8.3%inclusion7 decks84 decks
-10%synergy
Burning Inquiry
8.1%inclusion9 decks111 decks
7%synergy
Reckless Handling
8.1%inclusion9 decks111 decks
7%synergy
Vandalblast
8.1%inclusion9 decks111 decks
-8%synergy
Wheel of Misfortune
7.2%inclusion8 decks111 decks
4%synergy
Unmarked Grave
7.1%inclusion6 decks84 decks
5%synergy
Agadeem's Awakening
7.1%inclusion6 decks84 decks
4%synergy
Demonic Counsel
6.3%inclusion5 decks80 decks
4%synergy
Peer into the Abyss
6.0%inclusion5 decks84 decks
3%synergy
Electroduplicate
5.4%inclusion5 decks92 decks
4%synergy
Utility Artifacts
Wishclaw Talisman
51%inclusion43 decks84 decks
46%synergy
Jet Medallion
29%inclusion32 decks111 decks
25%synergy
Grinding Station
23%inclusion25 decks111 decks
22%synergy
The One Ring
22%inclusion24 decks111 decks
13%synergy
Skullclamp
20%inclusion22 decks111 decks
9%synergy
Sensei's Divining Top
14%inclusion15 decks111 decks
9%synergy
Defense Grid
11%inclusion12 decks111 decks
10%synergy
Lightning Greaves
11%inclusion12 decks111 decks
-14%synergy
Vexing Bauble
8.4%inclusion9 decks107 decks
7%synergy
Bolas's Citadel
8.3%inclusion7 decks84 decks
0%synergy
Moonsilver Key
8.1%inclusion9 decks111 decks
7%synergy
Mystic Forge
8.1%inclusion9 decks111 decks
5%synergy
Aetherflux Reservoir
8.1%inclusion9 decks111 decks
5%synergy
Ruby Medallion
8.1%inclusion9 decks111 decks
5%synergy
Semblance Anvil
7.2%inclusion8 decks111 decks
6%synergy
Ichor Wellspring
7.2%inclusion8 decks111 decks
6%synergy
Blasting Station
6.3%inclusion7 decks111 decks
6%synergy
Nim Deathmantle
6.3%inclusion7 decks111 decks
6%synergy
Krark-Clan Ironworks
6.3%inclusion7 decks111 decks
5%synergy
Altar of the Brood
6.3%inclusion7 decks111 decks
5%synergy
Swiftfoot Boots
6.3%inclusion7 decks111 decks
-21%synergy
Altar of the Wretched
6.0%inclusion5 decks84 decks
6%synergy
Prized Statue
5.4%inclusion6 decks111 decks
5%synergy
Cloudstone Curio
5.4%inclusion6 decks111 decks
5%synergy
Hazoret's Monument
5.4%inclusion6 decks111 decks
4%synergy
Enchantments
Chthonian Nightmare
65%inclusion53 decks82 decks
63%synergy
Exploration
50%inclusion3 decks6 decks
42%synergy
Sylvan Library
50%inclusion3 decks6 decks
41%synergy
Smothering Tithe
50%inclusion9 decks18 decks
28%synergy
Rhystic Study
42%inclusion5 decks12 decks
17%synergy
Mystic Remora
33%inclusion4 decks12 decks
17%synergy
Goblin Bombardment
32%inclusion35 decks111 decks
26%synergy
Animate Dead
20%inclusion17 decks84 decks
11%synergy
Impact Tremors
14%inclusion16 decks111 decks
5%synergy
Carnival of Souls
13%inclusion11 decks84 decks
13%synergy
Dance of the Dead
7.1%inclusion6 decks84 decks
6%synergy
Sneak Attack
6.3%inclusion7 decks111 decks
4%synergy
Blood Moon
6.3%inclusion7 decks111 decks
4%synergy
Tortured Existence
6.0%inclusion5 decks84 decks
4%synergy
Necromancy
6.0%inclusion5 decks84 decks
3%synergy
Utility Lands
Phyrexian Tower
74%inclusion62 decks84 decks
65%synergy
Shifting Woodland
67%inclusion4 decks6 decks
60%synergy
Crystal Vein
32%inclusion36 decks111 decks
31%synergy
Emergence Zone
27%inclusion30 decks111 decks
25%synergy
Eiganjo, Seat of the Empire
22%inclusion4 decks18 decks
15%synergy
Urza's Saga
19%inclusion21 decks111 decks
12%synergy
Ancient Den
17%inclusion3 decks18 decks
11%synergy
Buried Ruin
15%inclusion17 decks111 decks
11%synergy
Urborg, Tomb of Yawgmoth
14%inclusion15 decks111 decks
5%synergy
Takenuma, Abandoned Mire
13%inclusion11 decks84 decks
4%synergy
Vault of Whispers
11%inclusion9 decks84 decks
6%synergy
Bojuka Bog
11%inclusion9 decks84 decks
-19%synergy
City of Traitors
10%inclusion11 decks111 decks
9%synergy
High Market
9.0%inclusion10 decks111 decks
6%synergy
Inventors' Fair
9.0%inclusion10 decks111 decks
5%synergy
Reliquary Tower
9.0%inclusion10 decks111 decks
-21%synergy
Great Furnace
8.1%inclusion9 decks111 decks
2%synergy
Spymaster's Vault
7.3%inclusion6 decks82 decks
5%synergy
Mana Artifacts
Sol Ring
97%inclusion108 decks111 decks
14%synergy
Arcane Signet
83%inclusion92 decks111 decks
11%synergy
Talisman of Indulgence
74%inclusion62 decks84 decks
46%synergy
Lotus Petal
73%inclusion81 decks111 decks
66%synergy
Boros Signet
44%inclusion8 decks18 decks
25%synergy
Talisman of Dominance
43%inclusion3 decks7 decks
10%synergy
Talisman of Creativity
42%inclusion5 decks12 decks
13%synergy
Grim Monolith
34%inclusion38 decks111 decks
32%synergy
Talisman of Conviction
33%inclusion6 decks18 decks
9%synergy
Mox Opal
32%inclusion36 decks111 decks
28%synergy
Mox Diamond
27%inclusion30 decks111 decks
23%synergy
Fellwar Stone
27%inclusion30 decks111 decks
7%synergy
Izzet Signet
25%inclusion3 decks12 decks
0%synergy
Rakdos Signet
18%inclusion15 decks84 decks
-8%synergy
Mox Amber
15%inclusion17 decks111 decks
11%synergy
Mind Stone
11%inclusion12 decks111 decks
-4%synergy
Springleaf Drum
10%inclusion11 decks111 decks
8%synergy
Cursed Mirror
10%inclusion11 decks111 decks
4%synergy
Mana Crypt
9.0%inclusion10 decks111 decks
7%synergy
The Soul Stone
8.9%inclusion4 decks45 decks
5%synergy
Chromatic Star
6.3%inclusion7 decks111 decks
6%synergy
Jeweled Lotus
6.3%inclusion7 decks111 decks
5%synergy
Paradise Mantle
5.4%inclusion6 decks111 decks
5%synergy
Basalt Monolith
5.4%inclusion6 decks111 decks
3%synergy
Thought Vessel
5.4%inclusion6 decks111 decks
-12%synergy
Lands
Command Tower
83%inclusion92 decks111 decks
9%synergy
Blood Crypt
82%inclusion69 decks84 decks
45%synergy
Sulfurous Springs
80%inclusion67 decks84 decks
56%synergy
Luxury Suite
73%inclusion61 decks84 decks
48%synergy
Watery Grave
71%inclusion5 decks7 decks
30%synergy
Battlefield Forge
67%inclusion12 decks18 decks
38%synergy
Stomping Ground
67%inclusion4 decks6 decks
26%synergy
Bloodstained Mire
66%inclusion73 decks111 decks
55%synergy
Sacred Foundry
61%inclusion11 decks18 decks
25%synergy
Steam Vents
58%inclusion7 decks12 decks
21%synergy
City of Brass
58%inclusion64 decks111 decks
50%synergy
Mount Doom
57%inclusion48 decks84 decks
51%synergy
Underground River
57%inclusion4 decks7 decks
35%synergy
Blazemire Verge
55%inclusion44 decks80 decks
44%synergy
Arid Mesa
51%inclusion57 decks111 decks
41%synergy
Marsh Flats
51%inclusion57 decks111 decks
41%synergy
Badlands
51%inclusion43 decks84 decks
38%synergy
Raucous Theater
51%inclusion42 decks83 decks
40%synergy
Karplusan Forest
50%inclusion3 decks6 decks
30%synergy
Shivan Reef
50%inclusion6 decks12 decks
21%synergy
Caves of Koilos
50%inclusion3 decks6 decks
21%synergy
Godless Shrine
50%inclusion3 decks6 decks
9%synergy
Wooded Foothills
48%inclusion53 decks111 decks
37%synergy
Scalding Tarn
48%inclusion53 decks111 decks
37%synergy
Mana Confluence
46%inclusion51 decks111 decks
39%synergy
Polluted Delta
46%inclusion51 decks111 decks
34%synergy
Spectator Seating
44%inclusion8 decks18 decks
21%synergy
Morphic Pool
43%inclusion3 decks7 decks
18%synergy
Verdant Catacombs
42%inclusion47 decks111 decks
31%synergy
Plateau
39%inclusion7 decks18 decks
27%synergy
Gemstone Caverns
37%inclusion41 decks111 decks
32%synergy
Cavern of Souls
33%inclusion37 decks111 decks
26%synergy
Thundering Falls
33%inclusion4 decks12 decks
24%synergy
Training Center
33%inclusion4 decks12 decks
8%synergy
Clifftop Retreat
33%inclusion6 decks18 decks
-1%synergy
Starting Town
29%inclusion20 decks70 decks
26%synergy
Sunbaked Canyon
28%inclusion5 decks18 decks
23%synergy
Graven Cairns
27%inclusion23 decks84 decks
18%synergy
Volcanic Island
25%inclusion3 decks12 decks
11%synergy
Exotic Orchard
24%inclusion27 decks111 decks
-12%synergy
Dragonskull Summit
23%inclusion19 decks84 decks
-12%synergy
Inspiring Vantage
22%inclusion4 decks18 decks
18%synergy
Needleverge Pathway
22%inclusion4 decks18 decks
15%synergy
Rugged Prairie
17%inclusion3 decks18 decks
2%synergy
Smoldering Marsh
17%inclusion14 decks84 decks
-17%synergy
Spire of Industry
14%inclusion15 decks111 decks
10%synergy
Blackcleave Cliffs
12%inclusion10 decks84 decks
6%synergy
Blightstep Pathway
12%inclusion10 decks84 decks
4%synergy
Shadowblood Ridge
11%inclusion9 decks84 decks
-2%synergy
Lazotep Quarry
9.4%inclusion10 decks106 decks
9%synergy