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%inclusion55 decks5.47K decks
Garna, the Bloodflame
3.3%inclusion8 decks241 decks
Gerrard, Weatherlight Hero
0.6%inclusion3 decks485 decks
Herigast, Erupting Nullkite
0.1%inclusion3 decks4.31K decks
Koll, the Forgemaster
0.2%inclusion3 decks1.22K decks
Birgi, God of Storytelling
0.1%inclusion2 decks1.46K decks
Dargo, the Shipwrecker // Silas Renn, Seeker Adept
0.4%inclusion2 decks533 decks
Dargo, the Shipwrecker // Tevesh Szat, Doom of Fools
0.4%inclusion2 decks474 decks
Flubs, the Fool
0.0%inclusion1 decks19K decks
Deadpool, Trading Card
0.0%inclusion1 decks12.8K decks
The Locust God
0.0%inclusion1 decks6.37K decks
Kefka, Court Mage
0.0%inclusion1 decks17.7K decks
Grenzo, Dungeon Warden
0.0%inclusion1 decks4.04K decks
Zinnia, Valley's Voice
0.0%inclusion1 decks14.8K decks
Arbaaz Mir
0.1%inclusion1 decks1.63K decks
Urabrask
0.0%inclusion1 decks3.65K decks
Dargo, the Shipwrecker // Tymna the Weaver
0.1%inclusion1 decks1.37K decks
Wolverine, Best There Is
0.0%inclusion1 decks9.55K decks
New Cards
Aang's Iceberg
33%inclusion1 decks3 decks
33%synergy
The Last Agni Kai
19%inclusion4 decks21 decks
15%synergy
Redirect Lightning
10%inclusion4 decks42 decks
4%synergy
Desperate Plea
5.3%inclusion1 decks19 decks
5%synergy
Callous Inspector
5.0%inclusion1 decks20 decks
5%synergy
High Synergy Cards
Priest of Gix
77%inclusion63 decks82 decks
76%synergy
Culling the Weak
79%inclusion65 decks82 decks
75%synergy
Burnt Offering
74%inclusion61 decks82 decks
72%synergy
Warren Soultrader
78%inclusion62 decks80 decks
72%synergy
Sacrifice
72%inclusion59 decks82 decks
71%synergy
Cabal Ritual
76%inclusion62 decks82 decks
70%synergy
Shriekmaw
72%inclusion59 decks82 decks
70%synergy
Ashnod's Altar
74%inclusion81 decks109 decks
68%synergy
Viscera Seer
74%inclusion61 decks82 decks
66%synergy
Phyrexian Tower
74%inclusion61 decks82 decks
66%synergy
Top Cards
Dark Ritual
85%inclusion70 decks82 decks
61%synergy
Swords to Plowshares
78%inclusion14 decks18 decks
16%synergy
Reanimate
76%inclusion62 decks82 decks
57%synergy
Diabolic Intent
73%inclusion60 decks82 decks
65%synergy
Phyrexian Altar
69%inclusion75 decks109 decks
65%synergy
Entomb
67%inclusion55 decks82 decks
60%synergy
Brain Freeze
67%inclusion8 decks12 decks
63%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%inclusion58 decks82 decks
51%synergy
Vampiric Tutor
67%inclusion55 decks82 decks
52%synergy
Ancient Tomb
61%inclusion66 decks109 decks
51%synergy
Thassa's Oracle
58%inclusion7 decks12 decks
52%synergy
Gamble
58%inclusion63 decks109 decks
49%synergy
Mana Vault
57%inclusion62 decks109 decks
51%synergy
Chrome Mox
55%inclusion60 decks109 decks
49%synergy
Orcish Bowmasters
51%inclusion42 decks82 decks
43%synergy
Lion's Eye Diamond
48%inclusion52 decks109 decks
46%synergy
Necropotence
46%inclusion38 decks82 decks
41%synergy
Creatures
Ignoble Hierarch
75%inclusion3 decks4 decks
51%synergy
Poxwalkers
66%inclusion54 decks82 decks
66%synergy
Forsaken Miner
64%inclusion52 decks81 decks
63%synergy
Grief
63%inclusion52 decks82 decks
63%synergy
Grand Abolisher
61%inclusion11 decks18 decks
52%synergy
Golgari Thug
61%inclusion50 decks82 decks
60%synergy
Blood Pet
61%inclusion50 decks82 decks
60%synergy
K'rrik, Son of Yawgmoth
61%inclusion50 decks82 decks
59%synergy
Priest of Urabrask
61%inclusion66 decks109 decks
60%synergy
Greedy Freebooter
60%inclusion49 decks82 decks
58%synergy
Reckless Barbarian
59%inclusion64 decks109 decks
58%synergy
Esper Sentinel
56%inclusion10 decks18 decks
36%synergy
Umbral Collar Zealot
54%inclusion25 decks46 decks
51%synergy
Shambling Ghast
54%inclusion44 decks82 decks
53%synergy
Ingot Chewer
53%inclusion58 decks109 decks
53%synergy
Impulsive Pilferer
53%inclusion58 decks109 decks
51%synergy
Fury
50%inclusion55 decks109 decks
49%synergy
Simian Spirit Guide
50%inclusion55 decks109 decks
45%synergy
Ragavan, Nimble Pilferer
50%inclusion55 decks109 decks
43%synergy
Elvish Spirit Guide
50%inclusion3 decks6 decks
46%synergy
Eternal Witness
50%inclusion3 decks6 decks
33%synergy
Mindslicer
49%inclusion40 decks82 decks
48%synergy
Boggart Trawler
49%inclusion39 decks80 decks
45%synergy
Birgi, God of Storytelling
48%inclusion52 decks109 decks
42%synergy
Pinnacle Monk
46%inclusion48 decks105 decks
41%synergy
Sephiroth, Fabled SOLDIER
45%inclusion29 decks64 decks
43%synergy
Blood Artist
45%inclusion37 decks82 decks
34%synergy
Timeline Culler
45%inclusion21 decks47 decks
44%synergy
Recruiter of the Guard
44%inclusion8 decks18 decks
42%synergy
Archivist of Oghma
44%inclusion8 decks18 decks
40%synergy
Dargo, the Shipwrecker
44%inclusion48 decks109 decks
44%synergy
Dualcaster Mage
43%inclusion47 decks109 decks
39%synergy
Pitiless Plunderer
43%inclusion35 decks82 decks
34%synergy
Laboratory Maniac
42%inclusion5 decks12 decks
37%synergy
Party Thrasher
39%inclusion41 decks105 decks
37%synergy
Ranger-Captain of Eos
39%inclusion7 decks18 decks
35%synergy
Drannith Magistrate
39%inclusion7 decks18 decks
34%synergy
Deadpool, Trading Card
38%inclusion26 decks68 decks
36%synergy
Flamekin Harbinger
36%inclusion39 decks109 decks
35%synergy
Oswald Fiddlebender
33%inclusion6 decks18 decks
32%synergy
Skittering Precursor
31%inclusion33 decks105 decks
31%synergy
Charming Scoundrel
28%inclusion31 decks109 decks
27%synergy
Carrion Feeder
28%inclusion23 decks82 decks
24%synergy
Imperial Recruiter
28%inclusion30 decks109 decks
23%synergy
Mayhem Devil
27%inclusion22 decks82 decks
17%synergy
Atsushi, the Blazing Sky
26%inclusion28 decks109 decks
23%synergy
Emry, Lurker of the Loch
25%inclusion3 decks12 decks
21%synergy
Goblin Engineer
25%inclusion27 decks109 decks
22%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%inclusion70 decks109 decks
58%synergy
Saw in Half
61%inclusion50 decks82 decks
57%synergy
Pyroblast
61%inclusion66 decks109 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%inclusion63 decks109 decks
41%synergy
Flare of Duplication
56%inclusion59 decks105 decks
53%synergy
Deadly Rollick
54%inclusion44 decks82 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%inclusion37 decks82 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
26%inclusion21 decks80 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 decks99 decks
15%synergy
Chaos Warp
20%inclusion22 decks109 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
17%inclusion18 decks109 decks
12%synergy
Deadly Dispute
16%inclusion13 decks82 decks
4%synergy
Lightning Bolt
15%inclusion16 decks109 decks
4%synergy
Withering Torment
14%inclusion11 decks78 decks
6%synergy
Desperate Ritual
12%inclusion13 decks109 decks
9%synergy
Final Fortune
11%inclusion12 decks109 decks
9%synergy
Pyretic Ritual
11%inclusion12 decks109 decks
8%synergy
Abrade
11%inclusion12 decks109 decks
0%synergy
Imp's Mischief
11%inclusion9 decks82 decks
7%synergy
Seething Song
10%inclusion11 decks109 decks
4%synergy
Fell the Profane
10%inclusion8 decks80 decks
1%synergy
Tainted Pact
8.5%inclusion7 decks82 decks
5%synergy
Bolt Bend
7.3%inclusion8 decks109 decks
3%synergy
Mausoleum Secrets
6.1%inclusion5 decks82 decks
6%synergy
Corrupted Conviction
6.1%inclusion5 decks82 decks
1%synergy
Valakut Awakening
5.5%inclusion6 decks109 decks
0%synergy
Sorceries
Sevinne's Reclamation
61%inclusion11 decks18 decks
54%synergy
Infernal Plunge
56%inclusion61 decks109 decks
55%synergy
Rite of Flame
54%inclusion59 decks109 decks
50%synergy
Eldritch Evolution
50%inclusion3 decks6 decks
46%synergy
Jeska's Will
43%inclusion47 decks109 decks
27%synergy
Imperial Seal
43%inclusion35 decks82 decks
37%synergy
Molten Duplication
32%inclusion34 decks107 decks
30%synergy
Windfall
25%inclusion3 decks12 decks
13%synergy
Cabal Therapy
23%inclusion19 decks82 decks
23%synergy
Wheel of Fortune
23%inclusion25 decks109 decks
18%synergy
Faithless Looting
23%inclusion25 decks109 decks
7%synergy
Grim Tutor
21%inclusion17 decks82 decks
17%synergy
Buried Alive
18%inclusion15 decks82 decks
12%synergy
Open the Armory
17%inclusion3 decks18 decks
12%synergy
Blasphemous Act
14%inclusion15 decks109 decks
-19%synergy
Lively Dirge
11%inclusion9 decks81 decks
9%synergy
Twinflame
10%inclusion11 decks109 decks
7%synergy
Grapeshot
10%inclusion11 decks109 decks
6%synergy
Living Death
10%inclusion8 decks82 decks
4%synergy
Feed the Swarm
10%inclusion8 decks82 decks
-7%synergy
Praetor's Grasp
8.5%inclusion7 decks82 decks
6%synergy
Victimize
8.5%inclusion7 decks82 decks
-4%synergy
Toxic Deluge
8.5%inclusion7 decks82 decks
-10%synergy
Burning Inquiry
8.3%inclusion9 decks109 decks
7%synergy
Reckless Handling
8.3%inclusion9 decks109 decks
7%synergy
Vandalblast
8.3%inclusion9 decks109 decks
-7%synergy
Wheel of Misfortune
7.3%inclusion8 decks109 decks
4%synergy
Unmarked Grave
7.3%inclusion6 decks82 decks
5%synergy
Agadeem's Awakening
7.3%inclusion6 decks82 decks
4%synergy
Beseech the Mirror
7.3%inclusion6 decks82 decks
4%synergy
Demonic Counsel
6.4%inclusion5 decks78 decks
5%synergy
Electroduplicate
5.6%inclusion5 decks90 decks
4%synergy
Utility Artifacts
Wishclaw Talisman
50%inclusion41 decks82 decks
45%synergy
Jet Medallion
29%inclusion32 decks109 decks
26%synergy
Grinding Station
23%inclusion25 decks109 decks
22%synergy
The One Ring
21%inclusion23 decks109 decks
13%synergy
Skullclamp
20%inclusion22 decks109 decks
9%synergy
Sensei's Divining Top
13%inclusion14 decks109 decks
8%synergy
Defense Grid
11%inclusion12 decks109 decks
10%synergy
Lightning Greaves
11%inclusion12 decks109 decks
-14%synergy
Moonsilver Key
8.3%inclusion9 decks109 decks
7%synergy
Aetherflux Reservoir
8.3%inclusion9 decks109 decks
5%synergy
Ruby Medallion
8.3%inclusion9 decks109 decks
5%synergy
Vexing Bauble
7.6%inclusion8 decks105 decks
7%synergy
Semblance Anvil
7.3%inclusion8 decks109 decks
7%synergy
Ichor Wellspring
7.3%inclusion8 decks109 decks
6%synergy
Mystic Forge
7.3%inclusion8 decks109 decks
4%synergy
Bolas's Citadel
7.3%inclusion6 decks82 decks
-1%synergy
Blasting Station
6.4%inclusion7 decks109 decks
6%synergy
Nim Deathmantle
6.4%inclusion7 decks109 decks
6%synergy
Krark-Clan Ironworks
6.4%inclusion7 decks109 decks
5%synergy
Altar of the Brood
6.4%inclusion7 decks109 decks
5%synergy
Swiftfoot Boots
6.4%inclusion7 decks109 decks
-21%synergy
Prized Statue
5.5%inclusion6 decks109 decks
5%synergy
Cloudstone Curio
5.5%inclusion6 decks109 decks
5%synergy
Hazoret's Monument
5.5%inclusion6 decks109 decks
5%synergy
Enchantments
Chthonian Nightmare
65%inclusion52 decks80 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 decks109 decks
26%synergy
Animate Dead
20%inclusion16 decks82 decks
10%synergy
Impact Tremors
15%inclusion16 decks109 decks
5%synergy
Carnival of Souls
13%inclusion11 decks82 decks
13%synergy
Sneak Attack
6.4%inclusion7 decks109 decks
4%synergy
Blood Moon
6.4%inclusion7 decks109 decks
4%synergy
Dance of the Dead
6.1%inclusion5 decks82 decks
5%synergy
Tortured Existence
6.1%inclusion5 decks82 decks
4%synergy
Utility Lands
Shifting Woodland
67%inclusion4 decks6 decks
60%synergy
Crystal Vein
33%inclusion36 decks109 decks
32%synergy
Emergence Zone
28%inclusion30 decks109 decks
25%synergy
Eiganjo, Seat of the Empire
22%inclusion4 decks18 decks
15%synergy
Urza's Saga
19%inclusion21 decks109 decks
12%synergy
Ancient Den
17%inclusion3 decks18 decks
11%synergy
Buried Ruin
16%inclusion17 decks109 decks
11%synergy
Takenuma, Abandoned Mire
13%inclusion11 decks82 decks
5%synergy
Urborg, Tomb of Yawgmoth
13%inclusion14 decks109 decks
4%synergy
Vault of Whispers
11%inclusion9 decks82 decks
7%synergy
Bojuka Bog
11%inclusion9 decks82 decks
-19%synergy
City of Traitors
10%inclusion11 decks109 decks
9%synergy
High Market
9.2%inclusion10 decks109 decks
7%synergy
Inventors' Fair
9.2%inclusion10 decks109 decks
5%synergy
Reliquary Tower
9.2%inclusion10 decks109 decks
-21%synergy
Great Furnace
8.3%inclusion9 decks109 decks
2%synergy
Spymaster's Vault
7.5%inclusion6 decks80 decks
5%synergy
Mana Artifacts
Sol Ring
97%inclusion106 decks109 decks
13%synergy
Arcane Signet
83%inclusion91 decks109 decks
11%synergy
Talisman of Indulgence
74%inclusion61 decks82 decks
47%synergy
Lotus Petal
72%inclusion79 decks109 decks
65%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%inclusion37 decks109 decks
32%synergy
Talisman of Conviction
33%inclusion6 decks18 decks
9%synergy
Mox Opal
33%inclusion36 decks109 decks
29%synergy
Fellwar Stone
28%inclusion30 decks109 decks
7%synergy
Mox Diamond
27%inclusion29 decks109 decks
22%synergy
Izzet Signet
25%inclusion3 decks12 decks
0%synergy
Rakdos Signet
18%inclusion15 decks82 decks
-8%synergy
Mox Amber
15%inclusion16 decks109 decks
10%synergy
Mind Stone
11%inclusion12 decks109 decks
-4%synergy
Springleaf Drum
10%inclusion11 decks109 decks
8%synergy
Cursed Mirror
10%inclusion11 decks109 decks
4%synergy
The Soul Stone
9.3%inclusion4 decks43 decks
5%synergy
Mana Crypt
9.2%inclusion10 decks109 decks
7%synergy
Chromatic Star
6.4%inclusion7 decks109 decks
6%synergy
Jeweled Lotus
6.4%inclusion7 decks109 decks
5%synergy
Paradise Mantle
5.5%inclusion6 decks109 decks
5%synergy
Basalt Monolith
5.5%inclusion6 decks109 decks
3%synergy
Thought Vessel
5.5%inclusion6 decks109 decks
-12%synergy
Lands
Command Tower
83%inclusion91 decks109 decks
9%synergy
Blood Crypt
83%inclusion68 decks82 decks
46%synergy
Sulfurous Springs
80%inclusion66 decks82 decks
57%synergy
Luxury Suite
74%inclusion61 decks82 decks
50%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%inclusion72 decks109 decks
55%synergy
Sacred Foundry
61%inclusion11 decks18 decks
25%synergy
Mount Doom
59%inclusion48 decks82 decks
52%synergy
Steam Vents
58%inclusion7 decks12 decks
21%synergy
City of Brass
58%inclusion63 decks109 decks
50%synergy
Underground River
57%inclusion4 decks7 decks
35%synergy
Blazemire Verge
55%inclusion43 decks78 decks
44%synergy
Arid Mesa
51%inclusion56 decks109 decks
41%synergy
Marsh Flats
51%inclusion56 decks109 decks
41%synergy
Badlands
51%inclusion42 decks82 decks
38%synergy
Raucous Theater
51%inclusion41 decks81 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%inclusion52 decks109 decks
37%synergy
Scalding Tarn
48%inclusion52 decks109 decks
37%synergy
Mana Confluence
46%inclusion50 decks109 decks
39%synergy
Polluted Delta
46%inclusion50 decks109 decks
34%synergy
Spectator Seating
44%inclusion8 decks18 decks
21%synergy
Morphic Pool
43%inclusion3 decks7 decks
18%synergy
Verdant Catacombs
42%inclusion46 decks109 decks
31%synergy
Plateau
39%inclusion7 decks18 decks
27%synergy
Gemstone Caverns
37%inclusion40 decks109 decks
32%synergy
Cavern of Souls
34%inclusion37 decks109 decks
27%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
Graven Cairns
28%inclusion23 decks82 decks
19%synergy
Starting Town
28%inclusion19 decks68 decks
26%synergy
Sunbaked Canyon
28%inclusion5 decks18 decks
23%synergy
Volcanic Island
25%inclusion3 decks12 decks
11%synergy
Exotic Orchard
24%inclusion26 decks109 decks
-12%synergy
Dragonskull Summit
23%inclusion19 decks82 decks
-11%synergy
Inspiring Vantage
22%inclusion4 decks18 decks
18%synergy
Needleverge Pathway
22%inclusion4 decks18 decks
14%synergy
Smoldering Marsh
17%inclusion14 decks82 decks
-16%synergy
Rugged Prairie
17%inclusion3 decks18 decks
3%synergy
Spire of Industry
14%inclusion15 decks109 decks
11%synergy
Blackcleave Cliffs
12%inclusion10 decks82 decks
6%synergy
Blightstep Pathway
12%inclusion10 decks82 decks
4%synergy
Shadowblood Ridge
11%inclusion9 decks82 decks
-2%synergy
Talon Gates of Madara
10%inclusion10 decks104 decks
7%synergy