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 decks5.44K decks
Garna, the Bloodflame
3.4%inclusion8 decks234 decks
Gerrard, Weatherlight Hero
0.6%inclusion3 decks483 decks
Herigast, Erupting Nullkite
0.1%inclusion3 decks4.30K decks
Koll, the Forgemaster
0.3%inclusion3 decks1.19K decks
Birgi, God of Storytelling
0.1%inclusion2 decks1.42K decks
Dargo, the Shipwrecker // Silas Renn, Seeker Adept
0.4%inclusion2 decks537 decks
Dargo, the Shipwrecker // Tevesh Szat, Doom of Fools
0.4%inclusion2 decks463 decks
Flubs, the Fool
0.0%inclusion1 decks19.2K decks
Deadpool, Trading Card
0.0%inclusion1 decks13.1K decks
The Locust God
0.0%inclusion1 decks6.27K decks
Kefka, Court Mage
0.0%inclusion1 decks18.7K decks
Meria, Scholar of Antiquity
0.0%inclusion1 decks3.58K decks
Zinnia, Valley's Voice
0.0%inclusion1 decks14.8K decks
Arbaaz Mir
0.1%inclusion1 decks1.63K decks
Dargo, the Shipwrecker // Tymna the Weaver
0.1%inclusion1 decks1.50K decks
Wolverine, Best There Is
0.0%inclusion1 decks9.53K decks
The Lord of Pain
0.0%inclusion1 decks5.33K decks
New Cards
Aang's Iceberg
33%inclusion1 decks3 decks
32%synergy
Hexing Squelcher
20%inclusion1 decks5 decks
16%synergy
The Last Agni Kai
16%inclusion4 decks25 decks
12%synergy
Redirect Lightning
9.1%inclusion4 decks44 decks
3%synergy
Desperate Plea
4.5%inclusion1 decks22 decks
4%synergy
High Synergy Cards
Culling the Weak
81%inclusion66 decks81 decks
77%synergy
Priest of Gix
77%inclusion62 decks81 decks
76%synergy
Burnt Offering
77%inclusion62 decks81 decks
74%synergy
Sacrifice
74%inclusion60 decks81 decks
73%synergy
Warren Soultrader
78%inclusion63 decks81 decks
72%synergy
Shriekmaw
73%inclusion59 decks81 decks
71%synergy
Cabal Ritual
75%inclusion61 decks81 decks
70%synergy
Ashnod's Altar
74%inclusion80 decks108 decks
68%synergy
Poxwalkers
67%inclusion54 decks81 decks
66%synergy
Viscera Seer
74%inclusion60 decks81 decks
66%synergy
Top Cards
Dark Ritual
86%inclusion70 decks81 decks
62%synergy
Swords to Plowshares
82%inclusion14 decks17 decks
21%synergy
Reanimate
78%inclusion63 decks81 decks
59%synergy
Diabolic Intent
73%inclusion59 decks81 decks
65%synergy
Phyrexian Altar
68%inclusion73 decks108 decks
64%synergy
Brain Freeze
67%inclusion8 decks12 decks
63%synergy
Entomb
67%inclusion54 decks81 decks
60%synergy
Path to Exile
65%inclusion11 decks17 decks
18%synergy
Grief
64%inclusion52 decks81 decks
64%synergy
Forsaken Miner
64%inclusion52 decks81 decks
63%synergy
Game Changers
Demonic Tutor
72%inclusion58 decks81 decks
52%synergy
Vampiric Tutor
68%inclusion55 decks81 decks
53%synergy
Ancient Tomb
60%inclusion65 decks108 decks
51%synergy
Mana Vault
58%inclusion63 decks108 decks
52%synergy
Thassa's Oracle
58%inclusion7 decks12 decks
52%synergy
Gamble
58%inclusion63 decks108 decks
49%synergy
Chrome Mox
56%inclusion61 decks108 decks
50%synergy
Orcish Bowmasters
49%inclusion40 decks81 decks
41%synergy
Lion's Eye Diamond
48%inclusion52 decks108 decks
46%synergy
Necropotence
47%inclusion38 decks81 decks
42%synergy
Creatures
Ignoble Hierarch
75%inclusion3 decks4 decks
51%synergy
Golgari Thug
62%inclusion50 decks81 decks
61%synergy
Blood Pet
62%inclusion50 decks81 decks
61%synergy
K'rrik, Son of Yawgmoth
62%inclusion50 decks81 decks
59%synergy
Greedy Freebooter
60%inclusion49 decks81 decks
59%synergy
Priest of Urabrask
60%inclusion65 decks108 decks
60%synergy
Lotho, Corrupt Shirriff
60%inclusion3 decks5 decks
47%synergy
Reckless Barbarian
59%inclusion64 decks108 decks
58%synergy
Grand Abolisher
59%inclusion10 decks17 decks
50%synergy
Elvish Spirit Guide
57%inclusion4 decks7 decks
53%synergy
Birds of Paradise
57%inclusion4 decks7 decks
29%synergy
Shambling Ghast
54%inclusion44 decks81 decks
53%synergy
Ingot Chewer
54%inclusion58 decks108 decks
53%synergy
Impulsive Pilferer
54%inclusion58 decks108 decks
52%synergy
Umbral Collar Zealot
53%inclusion25 decks47 decks
50%synergy
Esper Sentinel
53%inclusion9 decks17 decks
34%synergy
Fury
51%inclusion55 decks108 decks
50%synergy
Simian Spirit Guide
50%inclusion54 decks108 decks
44%synergy
Mindslicer
49%inclusion40 decks81 decks
49%synergy
Birgi, God of Storytelling
49%inclusion53 decks108 decks
44%synergy
Ragavan, Nimble Pilferer
49%inclusion53 decks108 decks
41%synergy
Boggart Trawler
47%inclusion38 decks81 decks
43%synergy
Blood Artist
46%inclusion37 decks81 decks
34%synergy
Dargo, the Shipwrecker
45%inclusion49 decks108 decks
45%synergy
Pinnacle Monk
45%inclusion48 decks106 decks
41%synergy
Sephiroth, Fabled SOLDIER
45%inclusion29 decks65 decks
42%synergy
Dualcaster Mage
44%inclusion48 decks108 decks
40%synergy
Bloom Tender
43%inclusion3 decks7 decks
35%synergy
Eternal Witness
43%inclusion3 decks7 decks
26%synergy
Pitiless Plunderer
42%inclusion34 decks81 decks
33%synergy
Timeline Culler
42%inclusion20 decks48 decks
41%synergy
Laboratory Maniac
42%inclusion5 decks12 decks
37%synergy
Recruiter of the Guard
41%inclusion7 decks17 decks
38%synergy
Drannith Magistrate
41%inclusion7 decks17 decks
36%synergy
Archivist of Oghma
41%inclusion7 decks17 decks
36%synergy
Party Thrasher
39%inclusion41 decks106 decks
37%synergy
Flamekin Harbinger
37%inclusion40 decks108 decks
37%synergy
Deadpool, Trading Card
36%inclusion25 decks69 decks
34%synergy
Oswald Fiddlebender
35%inclusion6 decks17 decks
34%synergy
Ranger-Captain of Eos
35%inclusion6 decks17 decks
31%synergy
Skittering Precursor
31%inclusion33 decks106 decks
31%synergy
Charming Scoundrel
29%inclusion31 decks108 decks
28%synergy
Carrion Feeder
27%inclusion22 decks81 decks
23%synergy
Atsushi, the Blazing Sky
26%inclusion28 decks108 decks
24%synergy
Mayhem Devil
26%inclusion21 decks81 decks
16%synergy
Emry, Lurker of the Loch
25%inclusion3 decks12 decks
21%synergy
Imperial Recruiter
25%inclusion27 decks108 decks
20%synergy
Goblin Engineer
24%inclusion26 decks108 decks
21%synergy
Loyal Retainers
24%inclusion4 decks17 decks
23%synergy
Teshar, Ancestor's Apostle
24%inclusion4 decks17 decks
22%synergy
Instants
Assassin's Trophy
75%inclusion3 decks4 decks
45%synergy
Red Elemental Blast
64%inclusion69 decks108 decks
58%synergy
Saw in Half
63%inclusion51 decks81 decks
59%synergy
Pyroblast
61%inclusion66 decks108 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
57%inclusion62 decks108 decks
41%synergy
Flare of Duplication
56%inclusion59 decks106 decks
53%synergy
Deadly Rollick
54%inclusion44 decks81 decks
41%synergy
Pact of Negation
50%inclusion6 decks12 decks
43%synergy
Mystical Tutor
50%inclusion6 decks12 decks
38%synergy
Silence
47%inclusion8 decks17 decks
41%synergy
Enlightened Tutor
47%inclusion8 decks17 decks
32%synergy
Songs of the Damned
46%inclusion37 decks81 decks
45%synergy
Crop Rotation
43%inclusion3 decks7 decks
33%synergy
Worldly Tutor
43%inclusion3 decks7 decks
31%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
15%synergy
Flare of Malice
26%inclusion21 decks81 decks
23%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
22%inclusion22 decks100 decks
14%synergy
Chaos Warp
19%inclusion21 decks108 decks
-11%synergy
Second Sunrise
18%inclusion3 decks17 decks
17%synergy
Wear // Tear
18%inclusion3 decks17 decks
11%synergy
Teferi's Protection
18%inclusion3 decks17 decks
1%synergy
Deadly Dispute
16%inclusion13 decks81 decks
4%synergy
Tibalt's Trickery
16%inclusion17 decks108 decks
11%synergy
Withering Torment
14%inclusion11 decks79 decks
6%synergy
Lightning Bolt
14%inclusion15 decks108 decks
3%synergy
Final Fortune
11%inclusion12 decks108 decks
9%synergy
Imp's Mischief
11%inclusion9 decks81 decks
7%synergy
Abrade
11%inclusion12 decks108 decks
0%synergy
Desperate Ritual
10%inclusion11 decks108 decks
7%synergy
Pyretic Ritual
10%inclusion11 decks108 decks
7%synergy
Seething Song
9.3%inclusion10 decks108 decks
3%synergy
Tainted Pact
7.4%inclusion6 decks81 decks
4%synergy
Bolt Bend
7.4%inclusion8 decks108 decks
3%synergy
Fell the Profane
7.4%inclusion6 decks81 decks
-2%synergy
Mausoleum Secrets
6.2%inclusion5 decks81 decks
6%synergy
Corrupted Conviction
6.2%inclusion5 decks81 decks
2%synergy
Sorceries
Sevinne's Reclamation
59%inclusion10 decks17 decks
52%synergy
Infernal Plunge
56%inclusion61 decks108 decks
55%synergy
Rite of Flame
55%inclusion59 decks108 decks
51%synergy
Jeska's Will
44%inclusion47 decks108 decks
28%synergy
Imperial Seal
43%inclusion35 decks81 decks
38%synergy
Eldritch Evolution
43%inclusion3 decks7 decks
38%synergy
Molten Duplication
32%inclusion34 decks107 decks
30%synergy
Windfall
25%inclusion3 decks12 decks
13%synergy
Wheel of Fortune
24%inclusion26 decks108 decks
19%synergy
Cabal Therapy
23%inclusion19 decks81 decks
23%synergy
Grim Tutor
22%inclusion18 decks81 decks
18%synergy
Faithless Looting
22%inclusion24 decks108 decks
6%synergy
Buried Alive
19%inclusion15 decks81 decks
12%synergy
Open the Armory
18%inclusion3 decks17 decks
13%synergy
Blasphemous Act
14%inclusion15 decks108 decks
-19%synergy
Lively Dirge
11%inclusion9 decks81 decks
9%synergy
Twinflame
10%inclusion11 decks108 decks
8%synergy
Living Death
10%inclusion8 decks81 decks
5%synergy
Feed the Swarm
10%inclusion8 decks81 decks
-7%synergy
Grapeshot
9.3%inclusion10 decks108 decks
5%synergy
Praetor's Grasp
8.6%inclusion7 decks81 decks
7%synergy
Beseech the Mirror
8.6%inclusion7 decks81 decks
5%synergy
Victimize
8.6%inclusion7 decks81 decks
-4%synergy
Toxic Deluge
8.6%inclusion7 decks81 decks
-10%synergy
Burning Inquiry
8.3%inclusion9 decks108 decks
7%synergy
Reckless Handling
8.3%inclusion9 decks108 decks
7%synergy
Vandalblast
8.3%inclusion9 decks108 decks
-7%synergy
Unmarked Grave
7.4%inclusion6 decks81 decks
5%synergy
Agadeem's Awakening
7.4%inclusion6 decks81 decks
4%synergy
Wheel of Misfortune
6.5%inclusion7 decks108 decks
4%synergy
Demonic Counsel
6.3%inclusion5 decks79 decks
4%synergy
Electroduplicate
5.4%inclusion5 decks92 decks
4%synergy
Utility Artifacts
Wishclaw Talisman
52%inclusion42 decks81 decks
47%synergy
Jet Medallion
30%inclusion32 decks108 decks
26%synergy
Grinding Station
22%inclusion24 decks108 decks
21%synergy
The One Ring
22%inclusion24 decks108 decks
14%synergy
Skullclamp
20%inclusion22 decks108 decks
9%synergy
Sensei's Divining Top
15%inclusion16 decks108 decks
10%synergy
Lightning Greaves
12%inclusion13 decks108 decks
-13%synergy
Defense Grid
10%inclusion11 decks108 decks
9%synergy
Mystic Forge
9.3%inclusion10 decks108 decks
6%synergy
Aetherflux Reservoir
9.3%inclusion10 decks108 decks
6%synergy
Bolas's Citadel
8.6%inclusion7 decks81 decks
1%synergy
Vexing Bauble
8.5%inclusion9 decks106 decks
7%synergy
Semblance Anvil
8.3%inclusion9 decks108 decks
8%synergy
Moonsilver Key
8.3%inclusion9 decks108 decks
7%synergy
Krark-Clan Ironworks
7.4%inclusion8 decks108 decks
6%synergy
Ichor Wellspring
7.4%inclusion8 decks108 decks
6%synergy
Ruby Medallion
7.4%inclusion8 decks108 decks
4%synergy
Swiftfoot Boots
7.4%inclusion8 decks108 decks
-20%synergy
Blasting Station
6.5%inclusion7 decks108 decks
6%synergy
Nim Deathmantle
6.5%inclusion7 decks108 decks
6%synergy
Altar of the Brood
6.5%inclusion7 decks108 decks
5%synergy
Altar of the Wretched
6.2%inclusion5 decks81 decks
6%synergy
Prized Statue
5.6%inclusion6 decks108 decks
5%synergy
Cloudstone Curio
5.6%inclusion6 decks108 decks
5%synergy
Hazoret's Monument
5.6%inclusion6 decks108 decks
5%synergy
Mishra's Bauble
5.6%inclusion6 decks108 decks
4%synergy
Enchantments
Chthonian Nightmare
64%inclusion52 decks81 decks
63%synergy
Smothering Tithe
47%inclusion8 decks17 decks
25%synergy
Exploration
43%inclusion3 decks7 decks
35%synergy
Sylvan Library
43%inclusion3 decks7 decks
34%synergy
Rhystic Study
42%inclusion5 decks12 decks
17%synergy
Mystic Remora
33%inclusion4 decks12 decks
17%synergy
Goblin Bombardment
31%inclusion34 decks108 decks
26%synergy
Animate Dead
21%inclusion17 decks81 decks
12%synergy
Impact Tremors
15%inclusion16 decks108 decks
5%synergy
Carnival of Souls
14%inclusion11 decks81 decks
13%synergy
Dance of the Dead
7.4%inclusion6 decks81 decks
6%synergy
Blood Moon
7.4%inclusion8 decks108 decks
5%synergy
Sneak Attack
6.5%inclusion7 decks108 decks
4%synergy
Tortured Existence
6.2%inclusion5 decks81 decks
4%synergy
Necromancy
6.2%inclusion5 decks81 decks
3%synergy
Into the Pit
5.1%inclusion4 decks79 decks
4%synergy
Utility Lands
Phyrexian Tower
74%inclusion60 decks81 decks
65%synergy
Shifting Woodland
57%inclusion4 decks7 decks
50%synergy
Crystal Vein
33%inclusion36 decks108 decks
32%synergy
Emergence Zone
28%inclusion30 decks108 decks
25%synergy
Eiganjo, Seat of the Empire
24%inclusion4 decks17 decks
16%synergy
Urza's Saga
19%inclusion20 decks108 decks
11%synergy
Ancient Den
18%inclusion3 decks17 decks
12%synergy
Buried Ruin
15%inclusion16 decks108 decks
10%synergy
Urborg, Tomb of Yawgmoth
13%inclusion14 decks108 decks
4%synergy
Takenuma, Abandoned Mire
12%inclusion10 decks81 decks
4%synergy
Vault of Whispers
11%inclusion9 decks81 decks
7%synergy
Bojuka Bog
11%inclusion9 decks81 decks
-19%synergy
City of Traitors
10%inclusion11 decks108 decks
9%synergy
Inventors' Fair
9.3%inclusion10 decks108 decks
5%synergy
Reliquary Tower
9.3%inclusion10 decks108 decks
-21%synergy
High Market
8.3%inclusion9 decks108 decks
6%synergy
Great Furnace
8.3%inclusion9 decks108 decks
2%synergy
Spymaster's Vault
7.4%inclusion6 decks81 decks
5%synergy
Mana Artifacts
Sol Ring
98%inclusion106 decks108 decks
14%synergy
Arcane Signet
83%inclusion90 decks108 decks
11%synergy
Talisman of Indulgence
75%inclusion61 decks81 decks
47%synergy
Lotus Petal
74%inclusion80 decks108 decks
67%synergy
Boros Signet
47%inclusion8 decks17 decks
27%synergy
Talisman of Dominance
43%inclusion3 decks7 decks
10%synergy
Talisman of Creativity
42%inclusion5 decks12 decks
13%synergy
Talisman of Conviction
35%inclusion6 decks17 decks
11%synergy
Grim Monolith
34%inclusion37 decks108 decks
32%synergy
Mox Opal
32%inclusion35 decks108 decks
28%synergy
Mox Diamond
29%inclusion31 decks108 decks
24%synergy
Fellwar Stone
27%inclusion29 decks108 decks
6%synergy
Izzet Signet
25%inclusion3 decks12 decks
1%synergy
Rakdos Signet
19%inclusion15 decks81 decks
-7%synergy
Mox Amber
17%inclusion18 decks108 decks
12%synergy
Springleaf Drum
10%inclusion11 decks108 decks
8%synergy
Mind Stone
10%inclusion11 decks108 decks
-5%synergy
Cursed Mirror
9.3%inclusion10 decks108 decks
4%synergy
The Soul Stone
9.1%inclusion4 decks44 decks
5%synergy
Mana Crypt
8.3%inclusion9 decks108 decks
6%synergy
Chromatic Star
7.4%inclusion8 decks108 decks
7%synergy
Paradise Mantle
6.5%inclusion7 decks108 decks
6%synergy
Jeweled Lotus
5.6%inclusion6 decks108 decks
4%synergy
Basalt Monolith
5.6%inclusion6 decks108 decks
3%synergy
Lands
Command Tower
83%inclusion90 decks108 decks
9%synergy
Sulfurous Springs
81%inclusion66 decks81 decks
58%synergy
Blood Crypt
81%inclusion66 decks81 decks
44%synergy
Luxury Suite
73%inclusion59 decks81 decks
48%synergy
Watery Grave
71%inclusion5 decks7 decks
30%synergy
Bloodstained Mire
65%inclusion70 decks108 decks
54%synergy
Battlefield Forge
65%inclusion11 decks17 decks
36%synergy
Mount Doom
59%inclusion48 decks81 decks
53%synergy
Sacred Foundry
59%inclusion10 decks17 decks
22%synergy
Steam Vents
58%inclusion7 decks12 decks
21%synergy
City of Brass
57%inclusion62 decks108 decks
50%synergy
Underground River
57%inclusion4 decks7 decks
35%synergy
Stomping Ground
57%inclusion4 decks7 decks
16%synergy
Blazemire Verge
54%inclusion43 decks79 decks
43%synergy
Marsh Flats
51%inclusion55 decks108 decks
40%synergy
Badlands
51%inclusion41 decks81 decks
37%synergy
Arid Mesa
50%inclusion54 decks108 decks
40%synergy
Shivan Reef
50%inclusion6 decks12 decks
21%synergy
Raucous Theater
49%inclusion40 decks81 decks
39%synergy
Scalding Tarn
47%inclusion51 decks108 decks
36%synergy
Wooded Foothills
46%inclusion50 decks108 decks
35%synergy
Polluted Delta
46%inclusion50 decks108 decks
34%synergy
Mana Confluence
45%inclusion49 decks108 decks
38%synergy
Karplusan Forest
43%inclusion3 decks7 decks
23%synergy
Morphic Pool
43%inclusion3 decks7 decks
18%synergy
Verdant Catacombs
42%inclusion45 decks108 decks
31%synergy
Spectator Seating
41%inclusion7 decks17 decks
18%synergy
Gemstone Caverns
37%inclusion40 decks108 decks
32%synergy
Plateau
35%inclusion6 decks17 decks
23%synergy
Clifftop Retreat
35%inclusion6 decks17 decks
0%synergy
Cavern of Souls
34%inclusion37 decks108 decks
27%synergy
Thundering Falls
33%inclusion4 decks12 decks
24%synergy
Training Center
33%inclusion4 decks12 decks
8%synergy
Sunbaked Canyon
29%inclusion5 decks17 decks
25%synergy
Graven Cairns
27%inclusion22 decks81 decks
18%synergy
Starting Town
27%inclusion19 decks70 decks
25%synergy
Volcanic Island
25%inclusion3 decks12 decks
11%synergy
Exotic Orchard
24%inclusion26 decks108 decks
-12%synergy
Inspiring Vantage
24%inclusion4 decks17 decks
19%synergy
Needleverge Pathway
24%inclusion4 decks17 decks
16%synergy
Dragonskull Summit
22%inclusion18 decks81 decks
-12%synergy
Rugged Prairie
18%inclusion3 decks17 decks
3%synergy
Smoldering Marsh
16%inclusion13 decks81 decks
-17%synergy
Spire of Industry
14%inclusion15 decks108 decks
11%synergy
Blackcleave Cliffs
12%inclusion10 decks81 decks
6%synergy
Blightstep Pathway
12%inclusion10 decks81 decks
4%synergy
Shadowblood Ridge
10%inclusion8 decks81 decks
-3%synergy
Haunted Ridge
10%inclusion8 decks81 decks
-7%synergy
Talon Gates of Madara
10%inclusion10 decks105 decks
7%synergy
Rakdos Carnarium
8.6%inclusion7 decks81 decks
-4%synergy