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%inclusion58 decks5.53K decks
Garna, the Bloodflame
3.4%inclusion8 decks235 decks
Gerrard, Weatherlight Hero
0.6%inclusion3 decks490 decks
Herigast, Erupting Nullkite
0.1%inclusion3 decks4.42K 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 decks559 decks
Dargo, the Shipwrecker // Tevesh Szat, Doom of Fools
0.4%inclusion2 decks465 decks
Flubs, the Fool
0.0%inclusion1 decks19.8K decks
Deadpool, Trading Card
0.0%inclusion1 decks13.4K decks
The Locust God
0.0%inclusion1 decks6.29K decks
Kefka, Court Mage
0.0%inclusion1 decks19.6K decks
Meria, Scholar of Antiquity
0.0%inclusion1 decks3.55K decks
Zinnia, Valley's Voice
0.0%inclusion1 decks15.3K decks
Arbaaz Mir
0.1%inclusion1 decks1.65K decks
Dargo, the Shipwrecker // Tymna the Weaver
0.1%inclusion1 decks1.59K decks
Wolverine, Best There Is
0.0%inclusion1 decks9.67K decks
The Lord of Pain
0.0%inclusion1 decks5.50K decks
New Cards
Hexing Squelcher
36%inclusion4 decks11 decks
29%synergy
High Synergy Cards
Culling the Weak
82%inclusion69 decks84 decks
78%synergy
Priest of Gix
76%inclusion64 decks84 decks
76%synergy
Burnt Offering
77%inclusion65 decks84 decks
75%synergy
Sacrifice
75%inclusion63 decks84 decks
74%synergy
Warren Soultrader
79%inclusion66 decks84 decks
73%synergy
Shriekmaw
74%inclusion62 decks84 decks
72%synergy
Cabal Ritual
75%inclusion63 decks84 decks
70%synergy
Poxwalkers
68%inclusion57 decks84 decks
68%synergy
Ashnod's Altar
74%inclusion82 decks111 decks
67%synergy
Viscera Seer
75%inclusion63 decks84 decks
67%synergy
Top Cards
Dark Ritual
87%inclusion73 decks84 decks
63%synergy
Swords to Plowshares
81%inclusion13 decks16 decks
20%synergy
Reanimate
79%inclusion66 decks84 decks
60%synergy
Diabolic Intent
74%inclusion62 decks84 decks
66%synergy
Entomb
68%inclusion57 decks84 decks
61%synergy
Phyrexian Altar
68%inclusion75 decks111 decks
64%synergy
Brain Freeze
67%inclusion8 decks12 decks
63%synergy
Grief
65%inclusion55 decks84 decks
65%synergy
Forsaken Miner
65%inclusion55 decks84 decks
64%synergy
Saw in Half
64%inclusion54 decks84 decks
60%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
Mana Vault
59%inclusion66 decks111 decks
54%synergy
Gamble
59%inclusion65 decks111 decks
50%synergy
Thassa's Oracle
58%inclusion7 decks12 decks
52%synergy
Chrome Mox
57%inclusion63 decks111 decks
51%synergy
Orcish Bowmasters
51%inclusion43 decks84 decks
43%synergy
Lion's Eye Diamond
50%inclusion55 decks111 decks
48%synergy
Necropotence
48%inclusion40 decks84 decks
42%synergy
Creatures
Ignoble Hierarch
75%inclusion3 decks4 decks
50%synergy
Golgari Thug
62%inclusion52 decks84 decks
61%synergy
Greedy Freebooter
62%inclusion52 decks84 decks
61%synergy
Blood Pet
61%inclusion51 decks84 decks
60%synergy
K'rrik, Son of Yawgmoth
61%inclusion51 decks84 decks
58%synergy
Lotho, Corrupt Shirriff
60%inclusion3 decks5 decks
47%synergy
Priest of Urabrask
59%inclusion66 decks111 decks
59%synergy
Reckless Barbarian
59%inclusion66 decks111 decks
58%synergy
Elvish Spirit Guide
57%inclusion4 decks7 decks
53%synergy
Birds of Paradise
57%inclusion4 decks7 decks
30%synergy
Grand Abolisher
56%inclusion9 decks16 decks
47%synergy
Ingot Chewer
55%inclusion61 decks111 decks
54%synergy
Impulsive Pilferer
55%inclusion61 decks111 decks
53%synergy
Shambling Ghast
55%inclusion46 decks84 decks
54%synergy
Fury
52%inclusion58 decks111 decks
51%synergy
Simian Spirit Guide
52%inclusion58 decks111 decks
47%synergy
Umbral Collar Zealot
52%inclusion26 decks50 decks
49%synergy
Esper Sentinel
50%inclusion8 decks16 decks
31%synergy
Ragavan, Nimble Pilferer
50%inclusion55 decks111 decks
42%synergy
Mindslicer
49%inclusion41 decks84 decks
48%synergy
Boggart Trawler
49%inclusion41 decks84 decks
45%synergy
Birgi, God of Storytelling
49%inclusion54 decks111 decks
43%synergy
Dargo, the Shipwrecker
46%inclusion51 decks111 decks
46%synergy
Dualcaster Mage
46%inclusion51 decks111 decks
42%synergy
Sephiroth, Fabled SOLDIER
46%inclusion31 decks68 decks
43%synergy
Pinnacle Monk
45%inclusion50 decks110 decks
41%synergy
Blood Artist
44%inclusion37 decks84 decks
33%synergy
Timeline Culler
43%inclusion22 decks51 decks
42%synergy
Bloom Tender
43%inclusion3 decks7 decks
35%synergy
Eternal Witness
43%inclusion3 decks7 decks
26%synergy
Laboratory Maniac
42%inclusion5 decks12 decks
37%synergy
Pitiless Plunderer
40%inclusion34 decks84 decks
32%synergy
Party Thrasher
40%inclusion44 decks110 decks
38%synergy
Flamekin Harbinger
38%inclusion42 decks111 decks
37%synergy
Recruiter of the Guard
38%inclusion6 decks16 decks
35%synergy
Drannith Magistrate
38%inclusion6 decks16 decks
33%synergy
Archivist of Oghma
38%inclusion6 decks16 decks
33%synergy
Deadpool, Trading Card
35%inclusion25 decks72 decks
32%synergy
Oswald Fiddlebender
31%inclusion5 decks16 decks
30%synergy
Ranger-Captain of Eos
31%inclusion5 decks16 decks
27%synergy
Skittering Precursor
31%inclusion34 decks110 decks
31%synergy
Charming Scoundrel
30%inclusion33 decks111 decks
29%synergy
Mayhem Devil
29%inclusion24 decks84 decks
18%synergy
Atsushi, the Blazing Sky
27%inclusion30 decks111 decks
25%synergy
Carrion Feeder
26%inclusion22 decks84 decks
22%synergy
Loyal Retainers
25%inclusion4 decks16 decks
25%synergy
Teshar, Ancestor's Apostle
25%inclusion4 decks16 decks
23%synergy
Karmic Guide
25%inclusion4 decks16 decks
22%synergy
Emry, Lurker of the Loch
25%inclusion3 decks12 decks
21%synergy
Imperial Recruiter
24%inclusion27 decks111 decks
20%synergy
Instants
Assassin's Trophy
75%inclusion3 decks4 decks
45%synergy
Red Elemental Blast
64%inclusion71 decks111 decks
58%synergy
Path to Exile
63%inclusion10 decks16 decks
15%synergy
Pyroblast
62%inclusion69 decks111 decks
56%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
55%inclusion61 decks110 decks
53%synergy
Deadly Rollick
54%inclusion45 decks84 decks
40%synergy
Pact of Negation
50%inclusion6 decks12 decks
43%synergy
Mystical Tutor
50%inclusion6 decks12 decks
38%synergy
Songs of the Damned
46%inclusion39 decks84 decks
45%synergy
Silence
44%inclusion7 decks16 decks
37%synergy
Enlightened Tutor
44%inclusion7 decks16 decks
28%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
16%synergy
Flare of Malice
26%inclusion22 decks84 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
22%inclusion23 decks104 decks
14%synergy
Chaos Warp
21%inclusion23 decks111 decks
-9%synergy
Second Sunrise
19%inclusion3 decks16 decks
18%synergy
Wear // Tear
19%inclusion3 decks16 decks
12%synergy
Teferi's Protection
19%inclusion3 decks16 decks
2%synergy
Deadly Dispute
15%inclusion13 decks84 decks
3%synergy
Tibalt's Trickery
15%inclusion17 decks111 decks
11%synergy
Withering Torment
15%inclusion12 decks82 decks
7%synergy
Lightning Bolt
14%inclusion15 decks111 decks
2%synergy
Final Fortune
11%inclusion12 decks111 decks
9%synergy
Desperate Ritual
11%inclusion12 decks111 decks
8%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
Redirect Lightning
10%inclusion5 decks48 decks
4%synergy
The Last Agni Kai
10%inclusion3 decks29 decks
7%synergy
Seething Song
10%inclusion11 decks111 decks
4%synergy
Fell the Profane
8.3%inclusion7 decks84 decks
-1%synergy
Bolt Bend
7.2%inclusion8 decks111 decks
3%synergy
Tainted Pact
7.1%inclusion6 decks84 decks
3%synergy
Mausoleum Secrets
6.0%inclusion5 decks84 decks
6%synergy
Sorceries
Infernal Plunge
58%inclusion64 decks111 decks
57%synergy
Sevinne's Reclamation
56%inclusion9 decks16 decks
49%synergy
Rite of Flame
55%inclusion61 decks111 decks
51%synergy
Jeska's Will
44%inclusion49 decks111 decks
29%synergy
Imperial Seal
44%inclusion37 decks84 decks
39%synergy
Eldritch Evolution
43%inclusion3 decks7 decks
39%synergy
Molten Duplication
32%inclusion36 decks111 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
Grim Tutor
23%inclusion19 decks84 decks
19%synergy
Faithless Looting
22%inclusion24 decks111 decks
6%synergy
Buried Alive
20%inclusion17 decks84 decks
14%synergy
Open the Armory
19%inclusion3 decks16 decks
14%synergy
Blasphemous Act
15%inclusion17 decks111 decks
-18%synergy
Twinflame
11%inclusion12 decks111 decks
8%synergy
Lively Dirge
11%inclusion9 decks84 decks
9%synergy
Living Death
10%inclusion8 decks84 decks
4%synergy
Feed the Swarm
10%inclusion8 decks84 decks
-7%synergy
Burning Inquiry
9.0%inclusion10 decks111 decks
8%synergy
Grapeshot
9.0%inclusion10 decks111 decks
5%synergy
Vandalblast
9.0%inclusion10 decks111 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
Reckless Handling
8.1%inclusion9 decks111 decks
7%synergy
Unmarked Grave
7.1%inclusion6 decks84 decks
5%synergy
Agadeem's Awakening
7.1%inclusion6 decks84 decks
4%synergy
Wheel of Misfortune
6.3%inclusion7 decks111 decks
3%synergy
Demonic Counsel
6.1%inclusion5 decks82 decks
4%synergy
Electroduplicate
5.2%inclusion5 decks96 decks
4%synergy
Utility Artifacts
Wishclaw Talisman
51%inclusion43 decks84 decks
46%synergy
Jet Medallion
29%inclusion32 decks111 decks
25%synergy
The One Ring
23%inclusion26 decks111 decks
15%synergy
Grinding Station
23%inclusion25 decks111 decks
22%synergy
Skullclamp
19%inclusion21 decks111 decks
8%synergy
Sensei's Divining Top
14%inclusion16 decks111 decks
10%synergy
Lightning Greaves
12%inclusion13 decks111 decks
-13%synergy
Defense Grid
10%inclusion11 decks111 decks
9%synergy
Mystic Forge
9.0%inclusion10 decks111 decks
6%synergy
Aetherflux Reservoir
9.0%inclusion10 decks111 decks
6%synergy
Bolas's Citadel
8.3%inclusion7 decks84 decks
0%synergy
Vexing Bauble
8.2%inclusion9 decks110 decks
7%synergy
Semblance Anvil
8.1%inclusion9 decks111 decks
7%synergy
Moonsilver Key
8.1%inclusion9 decks111 decks
7%synergy
Ruby Medallion
8.1%inclusion9 decks111 decks
5%synergy
Krark-Clan Ironworks
7.2%inclusion8 decks111 decks
6%synergy
Ichor Wellspring
7.2%inclusion8 decks111 decks
6%synergy
Swiftfoot Boots
7.2%inclusion8 decks111 decks
-20%synergy
Nim Deathmantle
6.3%inclusion7 decks111 decks
6%synergy
Hazoret's Monument
6.3%inclusion7 decks111 decks
5%synergy
Altar of the Wretched
6.0%inclusion5 decks84 decks
6%synergy
Blasting Station
5.4%inclusion6 decks111 decks
5%synergy
Prized Statue
5.4%inclusion6 decks111 decks
5%synergy
Altar of the Brood
5.4%inclusion6 decks111 decks
4%synergy
Mishra's Bauble
5.4%inclusion6 decks111 decks
4%synergy
Enchantments
Chthonian Nightmare
63%inclusion53 decks84 decks
62%synergy
Smothering Tithe
50%inclusion8 decks16 decks
29%synergy
Exploration
43%inclusion3 decks7 decks
35%synergy
Sylvan Library
43%inclusion3 decks7 decks
34%synergy
Rhystic Study
42%inclusion5 decks12 decks
18%synergy
Mystic Remora
33%inclusion4 decks12 decks
17%synergy
Goblin Bombardment
31%inclusion34 decks111 decks
25%synergy
Animate Dead
21%inclusion18 decks84 decks
13%synergy
Impact Tremors
14%inclusion16 decks111 decks
5%synergy
Carnival of Souls
12%inclusion10 decks84 decks
12%synergy
Blood Moon
8.1%inclusion9 decks111 decks
6%synergy
Dance of the Dead
7.1%inclusion6 decks84 decks
6%synergy
Sneak Attack
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
75%inclusion63 decks84 decks
66%synergy
Shifting Woodland
57%inclusion4 decks7 decks
50%synergy
Crystal Vein
33%inclusion37 decks111 decks
32%synergy
Emergence Zone
28%inclusion31 decks111 decks
25%synergy
Urza's Saga
19%inclusion21 decks111 decks
12%synergy
Ancient Den
19%inclusion3 decks16 decks
13%synergy
Eiganjo, Seat of the Empire
19%inclusion3 decks16 decks
12%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
Bojuka Bog
12%inclusion10 decks84 decks
-18%synergy
Vault of Whispers
11%inclusion9 decks84 decks
6%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
Spymaster's Vault
8.3%inclusion7 decks84 decks
6%synergy
Great Furnace
8.1%inclusion9 decks111 decks
2%synergy
Mana Artifacts
Sol Ring
98%inclusion109 decks111 decks
14%synergy
Arcane Signet
84%inclusion93 decks111 decks
11%synergy
Talisman of Indulgence
77%inclusion65 decks84 decks
50%synergy
Lotus Petal
74%inclusion82 decks111 decks
67%synergy
Boros Signet
44%inclusion7 decks16 decks
24%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
Mox Opal
32%inclusion35 decks111 decks
27%synergy
Talisman of Conviction
31%inclusion5 decks16 decks
7%synergy
Mox Diamond
29%inclusion32 decks111 decks
25%synergy
Fellwar Stone
29%inclusion32 decks111 decks
8%synergy
Izzet Signet
25%inclusion3 decks12 decks
1%synergy
Rakdos Signet
18%inclusion15 decks84 decks
-7%synergy
Mox Amber
15%inclusion17 decks111 decks
11%synergy
Springleaf Drum
10%inclusion11 decks111 decks
8%synergy
Mind Stone
10%inclusion11 decks111 decks
-5%synergy
Cursed Mirror
9.0%inclusion10 decks111 decks
3%synergy
The Soul Stone
8.5%inclusion4 decks47 decks
4%synergy
Chromatic Star
7.2%inclusion8 decks111 decks
7%synergy
Mana Crypt
7.2%inclusion8 decks111 decks
5%synergy
Paradise Mantle
5.4%inclusion6 decks111 decks
5%synergy
Basalt Monolith
5.4%inclusion6 decks111 decks
3%synergy
Lands
Command Tower
83%inclusion92 decks111 decks
9%synergy
Sulfurous Springs
82%inclusion69 decks84 decks
59%synergy
Blood Crypt
81%inclusion68 decks84 decks
43%synergy
Luxury Suite
74%inclusion62 decks84 decks
50%synergy
Watery Grave
71%inclusion5 decks7 decks
30%synergy
Battlefield Forge
69%inclusion11 decks16 decks
40%synergy
Bloodstained Mire
64%inclusion71 decks111 decks
53%synergy
Mount Doom
58%inclusion49 decks84 decks
52%synergy
Steam Vents
58%inclusion7 decks12 decks
20%synergy
Blazemire Verge
57%inclusion47 decks82 decks
46%synergy
Underground River
57%inclusion4 decks7 decks
35%synergy
Stomping Ground
57%inclusion4 decks7 decks
16%synergy
City of Brass
57%inclusion63 decks111 decks
49%synergy
Sacred Foundry
56%inclusion9 decks16 decks
20%synergy
Badlands
51%inclusion43 decks84 decks
38%synergy
Arid Mesa
50%inclusion56 decks111 decks
40%synergy
Marsh Flats
50%inclusion56 decks111 decks
40%synergy
Shivan Reef
50%inclusion6 decks12 decks
21%synergy
Raucous Theater
49%inclusion41 decks84 decks
39%synergy
Scalding Tarn
48%inclusion53 decks111 decks
37%synergy
Polluted Delta
47%inclusion52 decks111 decks
35%synergy
Mana Confluence
46%inclusion51 decks111 decks
39%synergy
Wooded Foothills
46%inclusion51 decks111 decks
35%synergy
Spectator Seating
44%inclusion7 decks16 decks
21%synergy
Karplusan Forest
43%inclusion3 decks7 decks
23%synergy
Morphic Pool
43%inclusion3 decks7 decks
18%synergy
Verdant Catacombs
41%inclusion46 decks111 decks
30%synergy
Clifftop Retreat
38%inclusion6 decks16 decks
2%synergy
Gemstone Caverns
37%inclusion41 decks111 decks
32%synergy
Cavern of Souls
35%inclusion39 decks111 decks
28%synergy
Thundering Falls
33%inclusion4 decks12 decks
24%synergy
Training Center
33%inclusion4 decks12 decks
8%synergy
Sunbaked Canyon
31%inclusion5 decks16 decks
27%synergy
Plateau
31%inclusion5 decks16 decks
19%synergy
Graven Cairns
29%inclusion24 decks84 decks
19%synergy
Starting Town
27%inclusion20 decks74 decks
25%synergy
Exotic Orchard
25%inclusion28 decks111 decks
-11%synergy
Inspiring Vantage
25%inclusion4 decks16 decks
20%synergy
Volcanic Island
25%inclusion3 decks12 decks
11%synergy
Dragonskull Summit
23%inclusion19 decks84 decks
-12%synergy
Needleverge Pathway
19%inclusion3 decks16 decks
11%synergy
Rugged Prairie
19%inclusion3 decks16 decks
4%synergy
Smoldering Marsh
17%inclusion14 decks84 decks
-17%synergy
Spire of Industry
14%inclusion16 decks111 decks
11%synergy
Blackcleave Cliffs
14%inclusion12 decks84 decks
8%synergy
Blightstep Pathway
12%inclusion10 decks84 decks
4%synergy
Shadowblood Ridge
11%inclusion9 decks84 decks
-2%synergy
Haunted Ridge
11%inclusion9 decks84 decks
-6%synergy
Rakdos Carnarium
10%inclusion8 decks84 decks
-3%synergy
Lazotep Quarry
9.2%inclusion10 decks109 decks
8%synergy