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
0.9%inclusion50 decks5.35K decks
Garna, the Bloodflame
3.0%inclusion7 decks233 decks
Gerrard, Weatherlight Hero
0.6%inclusion3 decks481 decks
Herigast, Erupting Nullkite
0.1%inclusion3 decks4.21K decks
Koll, the Forgemaster
0.2%inclusion3 decks1.21K decks
Birgi, God of Storytelling
0.1%inclusion2 decks1.49K decks
Dargo, the Shipwrecker // Tevesh Szat, Doom of Fools
0.4%inclusion2 decks482 decks
Flubs, the Fool
0.0%inclusion1 decks18.3K decks
Deadpool, Trading Card
0.0%inclusion1 decks12.4K decks
The Locust God
0.0%inclusion1 decks6.33K decks
Dargo, the Shipwrecker // Silas Renn, Seeker Adept
0.2%inclusion1 decks521 decks
Kefka, Court Mage
0.0%inclusion1 decks16.7K decks
Grenzo, Dungeon Warden
0.0%inclusion1 decks4.01K decks
Zinnia, Valley's Voice
0.0%inclusion1 decks14.4K decks
Arbaaz Mir
0.1%inclusion1 decks1.59K decks
Urabrask
0.0%inclusion1 decks3.63K decks
Dargo, the Shipwrecker // Tymna the Weaver
0.1%inclusion1 decks1.29K decks
Wolverine, Best There Is
0.0%inclusion1 decks9.32K decks
New Cards
The Last Agni Kai
18%inclusion2 decks11 decks
14%synergy
Desperate Plea
10%inclusion1 decks10 decks
10%synergy
Longshot, Rebel Bowman
9.1%inclusion1 decks11 decks
7%synergy
Redirect Lightning
6.1%inclusion2 decks33 decks
2%synergy
High Synergy Cards
Priest of Gix
79%inclusion59 decks75 decks
78%synergy
Culling the Weak
79%inclusion59 decks75 decks
75%synergy
Burnt Offering
76%inclusion57 decks75 decks
74%synergy
Warren Soultrader
78%inclusion57 decks73 decks
73%synergy
Sacrifice
72%inclusion54 decks75 decks
71%synergy
Viscera Seer
77%inclusion58 decks75 decks
69%synergy
Shriekmaw
71%inclusion53 decks75 decks
69%synergy
Ashnod's Altar
74%inclusion75 decks101 decks
68%synergy
Phyrexian Tower
76%inclusion57 decks75 decks
67%synergy
Chthonian Nightmare
68%inclusion50 decks73 decks
67%synergy
Top Cards
Dark Ritual
84%inclusion63 decks75 decks
60%synergy
Swords to Plowshares
82%inclusion14 decks17 decks
21%synergy
Reanimate
77%inclusion58 decks75 decks
59%synergy
Cabal Ritual
72%inclusion54 decks75 decks
67%synergy
Diabolic Intent
72%inclusion54 decks75 decks
64%synergy
Path to Exile
71%inclusion12 decks17 decks
23%synergy
Entomb
68%inclusion51 decks75 decks
61%synergy
Phyrexian Altar
67%inclusion68 decks101 decks
64%synergy
Lotho, Corrupt Shirriff
67%inclusion4 decks6 decks
54%synergy
Birds of Paradise
67%inclusion4 decks6 decks
39%synergy
Game Changers
Demonic Tutor
71%inclusion53 decks75 decks
51%synergy
Vampiric Tutor
68%inclusion51 decks75 decks
52%synergy
Thassa's Oracle
64%inclusion7 decks11 decks
57%synergy
Ancient Tomb
60%inclusion61 decks101 decks
51%synergy
Gamble
57%inclusion58 decks101 decks
48%synergy
Mana Vault
56%inclusion57 decks101 decks
50%synergy
Orcish Bowmasters
56%inclusion42 decks75 decks
47%synergy
Chrome Mox
55%inclusion56 decks101 decks
49%synergy
Mystical Tutor
55%inclusion6 decks11 decks
42%synergy
Lion's Eye Diamond
49%inclusion49 decks101 decks
47%synergy
Creatures
Ignoble Hierarch
75%inclusion3 decks4 decks
51%synergy
Poxwalkers
65%inclusion49 decks75 decks
65%synergy
Forsaken Miner
65%inclusion48 decks74 decks
64%synergy
Grief
64%inclusion48 decks75 decks
64%synergy
Blood Pet
63%inclusion47 decks75 decks
62%synergy
Greedy Freebooter
63%inclusion47 decks75 decks
61%synergy
Priest of Urabrask
62%inclusion63 decks101 decks
62%synergy
Golgari Thug
61%inclusion46 decks75 decks
60%synergy
K'rrik, Son of Yawgmoth
61%inclusion46 decks75 decks
59%synergy
Grand Abolisher
59%inclusion10 decks17 decks
50%synergy
Esper Sentinel
59%inclusion10 decks17 decks
40%synergy
Reckless Barbarian
56%inclusion57 decks101 decks
55%synergy
Umbral Collar Zealot
55%inclusion21 decks38 decks
52%synergy
Shambling Ghast
55%inclusion41 decks75 decks
54%synergy
Impulsive Pilferer
54%inclusion55 decks101 decks
52%synergy
Ragavan, Nimble Pilferer
54%inclusion55 decks101 decks
47%synergy
Boggart Trawler
53%inclusion39 decks73 decks
50%synergy
Ingot Chewer
52%inclusion53 decks101 decks
52%synergy
Simian Spirit Guide
51%inclusion52 decks101 decks
46%synergy
Fury
50%inclusion51 decks101 decks
50%synergy
Elvish Spirit Guide
50%inclusion3 decks6 decks
46%synergy
Eternal Witness
50%inclusion3 decks6 decks
32%synergy
Birgi, God of Storytelling
48%inclusion48 decks101 decks
42%synergy
Sephiroth, Fabled SOLDIER
47%inclusion27 decks57 decks
45%synergy
Archivist of Oghma
47%inclusion8 decks17 decks
42%synergy
Mindslicer
47%inclusion35 decks75 decks
46%synergy
Timeline Culler
46%inclusion18 decks39 decks
45%synergy
Laboratory Maniac
45%inclusion5 decks11 decks
41%synergy
Dualcaster Mage
45%inclusion45 decks101 decks
40%synergy
Pinnacle Monk
44%inclusion43 decks97 decks
40%synergy
Dargo, the Shipwrecker
44%inclusion44 decks101 decks
43%synergy
Party Thrasher
42%inclusion41 decks97 decks
41%synergy
Pitiless Plunderer
41%inclusion31 decks75 decks
33%synergy
Blood Artist
41%inclusion31 decks75 decks
30%synergy
Recruiter of the Guard
41%inclusion7 decks17 decks
38%synergy
Ranger-Captain of Eos
41%inclusion7 decks17 decks
37%synergy
Drannith Magistrate
41%inclusion7 decks17 decks
36%synergy
Deadpool, Trading Card
39%inclusion24 decks61 decks
37%synergy
Flamekin Harbinger
35%inclusion35 decks101 decks
34%synergy
Skittering Precursor
32%inclusion31 decks97 decks
32%synergy
Charming Scoundrel
30%inclusion30 decks101 decks
29%synergy
Oswald Fiddlebender
29%inclusion5 decks17 decks
28%synergy
Carrion Feeder
28%inclusion21 decks75 decks
24%synergy
Mayhem Devil
28%inclusion21 decks75 decks
18%synergy
Imperial Recruiter
27%inclusion27 decks101 decks
22%synergy
Atsushi, the Blazing Sky
24%inclusion24 decks101 decks
21%synergy
Teshar, Ancestor's Apostle
24%inclusion4 decks17 decks
22%synergy
Aven Mindcensor
24%inclusion4 decks17 decks
20%synergy
Goblin Engineer
23%inclusion23 decks101 decks
20%synergy
Hoarding Broodlord
23%inclusion17 decks75 decks
21%synergy
Instants
Assassin's Trophy
75%inclusion3 decks4 decks
45%synergy
Brain Freeze
64%inclusion7 decks11 decks
60%synergy
Swan Song
64%inclusion7 decks11 decks
46%synergy
Red Elemental Blast
63%inclusion64 decks101 decks
57%synergy
Saw in Half
63%inclusion47 decks75 decks
59%synergy
Pyroblast
61%inclusion62 decks101 decks
56%synergy
Deflecting Swat
57%inclusion58 decks101 decks
41%synergy
Flare of Duplication
56%inclusion54 decks97 decks
53%synergy
Deadly Rollick
55%inclusion41 decks75 decks
41%synergy
Pact of Negation
55%inclusion6 decks11 decks
48%synergy
An Offer You Can't Refuse
55%inclusion6 decks11 decks
31%synergy
Silence
53%inclusion9 decks17 decks
47%synergy
Crop Rotation
50%inclusion3 decks6 decks
40%synergy
Worldly Tutor
50%inclusion3 decks6 decks
38%synergy
Enlightened Tutor
47%inclusion8 decks17 decks
31%synergy
Frantic Search
45%inclusion5 decks11 decks
31%synergy
Counterspell
45%inclusion5 decks11 decks
4%synergy
Songs of the Damned
44%inclusion33 decks75 decks
43%synergy
Spell Pierce
36%inclusion4 decks11 decks
33%synergy
Force of Negation
36%inclusion4 decks11 decks
28%synergy
Fierce Guardianship
36%inclusion4 decks11 decks
19%synergy
Borne Upon a Wind
27%inclusion3 decks11 decks
23%synergy
Mindbreak Trap
27%inclusion3 decks11 decks
22%synergy
Flusterstorm
27%inclusion3 decks11 decks
20%synergy
Snap
27%inclusion3 decks11 decks
20%synergy
Force of Will
27%inclusion3 decks11 decks
17%synergy
Cyclonic Rift
27%inclusion3 decks11 decks
4%synergy
Flare of Malice
26%inclusion19 decks73 decks
24%synergy
Untimely Malfunction
24%inclusion22 decks91 decks
16%synergy
Chaos Warp
20%inclusion20 decks101 decks
-11%synergy
Tibalt's Trickery
18%inclusion18 decks101 decks
13%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
15%inclusion11 decks75 decks
3%synergy
Withering Torment
14%inclusion10 decks71 decks
6%synergy
Lightning Bolt
14%inclusion14 decks101 decks
3%synergy
Pyretic Ritual
12%inclusion12 decks101 decks
9%synergy
Abrade
12%inclusion12 decks101 decks
0%synergy
Imp's Mischief
11%inclusion8 decks75 decks
7%synergy
Final Fortune
10%inclusion10 decks101 decks
8%synergy
Desperate Ritual
10%inclusion10 decks101 decks
7%synergy
Fell the Profane
10%inclusion7 decks73 decks
1%synergy
Seething Song
8.9%inclusion9 decks101 decks
3%synergy
Tainted Pact
8.0%inclusion6 decks75 decks
4%synergy
Bolt Bend
6.9%inclusion7 decks101 decks
3%synergy
Corrupted Conviction
6.7%inclusion5 decks75 decks
2%synergy
Valakut Awakening
5.9%inclusion6 decks101 decks
1%synergy
Mausoleum Secrets
5.3%inclusion4 decks75 decks
5%synergy
Village Rites
5.3%inclusion4 decks75 decks
-4%synergy
Sorceries
Sevinne's Reclamation
65%inclusion11 decks17 decks
57%synergy
Infernal Plunge
55%inclusion56 decks101 decks
54%synergy
Rite of Flame
53%inclusion54 decks101 decks
50%synergy
Eldritch Evolution
50%inclusion3 decks6 decks
46%synergy
Imperial Seal
44%inclusion33 decks75 decks
39%synergy
Jeska's Will
43%inclusion43 decks101 decks
27%synergy
Molten Duplication
34%inclusion34 decks99 decks
32%synergy
Windfall
27%inclusion3 decks11 decks
15%synergy
Wheel of Fortune
24%inclusion24 decks101 decks
19%synergy
Faithless Looting
24%inclusion24 decks101 decks
8%synergy
Cabal Therapy
23%inclusion17 decks75 decks
23%synergy
Grim Tutor
21%inclusion16 decks75 decks
17%synergy
Open the Armory
18%inclusion3 decks17 decks
13%synergy
Buried Alive
17%inclusion13 decks75 decks
11%synergy
Blasphemous Act
15%inclusion15 decks101 decks
-18%synergy
Twinflame
11%inclusion11 decks101 decks
8%synergy
Lively Dirge
11%inclusion8 decks74 decks
9%synergy
Feed the Swarm
11%inclusion8 decks75 decks
-6%synergy
Toxic Deluge
11%inclusion8 decks75 decks
-8%synergy
Grapeshot
10%inclusion10 decks101 decks
6%synergy
Living Death
9.3%inclusion7 decks75 decks
4%synergy
Victimize
9.3%inclusion7 decks75 decks
-3%synergy
Burning Inquiry
8.9%inclusion9 decks101 decks
8%synergy
Reckless Handling
8.9%inclusion9 decks101 decks
8%synergy
Vandalblast
8.9%inclusion9 decks101 decks
-7%synergy
Unmarked Grave
8.0%inclusion6 decks75 decks
6%synergy
Agadeem's Awakening
8.0%inclusion6 decks75 decks
5%synergy
Beseech the Mirror
8.0%inclusion6 decks75 decks
5%synergy
Wheel of Misfortune
7.9%inclusion8 decks101 decks
5%synergy
Praetor's Grasp
6.7%inclusion5 decks75 decks
5%synergy
Unearth
5.3%inclusion4 decks75 decks
2%synergy
Utility Artifacts
Wishclaw Talisman
53%inclusion40 decks75 decks
48%synergy
Jet Medallion
31%inclusion31 decks101 decks
27%synergy
The One Ring
24%inclusion24 decks101 decks
15%synergy
Grinding Station
22%inclusion22 decks101 decks
21%synergy
Skullclamp
20%inclusion20 decks101 decks
9%synergy
Sensei's Divining Top
14%inclusion14 decks101 decks
9%synergy
Lightning Greaves
12%inclusion12 decks101 decks
-13%synergy
Defense Grid
10%inclusion10 decks101 decks
9%synergy
Moonsilver Key
8.9%inclusion9 decks101 decks
8%synergy
Aetherflux Reservoir
8.9%inclusion9 decks101 decks
6%synergy
Ichor Wellspring
7.9%inclusion8 decks101 decks
6%synergy
Mystic Forge
7.9%inclusion8 decks101 decks
5%synergy
Blasting Station
6.9%inclusion7 decks101 decks
6%synergy
Krark-Clan Ironworks
6.9%inclusion7 decks101 decks
6%synergy
Ruby Medallion
6.9%inclusion7 decks101 decks
4%synergy
Swiftfoot Boots
6.9%inclusion7 decks101 decks
-20%synergy
Bolas's Citadel
6.7%inclusion5 decks75 decks
-1%synergy
Vexing Bauble
6.2%inclusion6 decks97 decks
5%synergy
Nim Deathmantle
5.9%inclusion6 decks101 decks
5%synergy
Semblance Anvil
5.9%inclusion6 decks101 decks
5%synergy
Cloudstone Curio
5.9%inclusion6 decks101 decks
5%synergy
Hazoret's Monument
5.9%inclusion6 decks101 decks
5%synergy
Altar of the Brood
5.9%inclusion6 decks101 decks
5%synergy
Enchantments
Smothering Tithe
53%inclusion9 decks17 decks
31%synergy
Exploration
50%inclusion3 decks6 decks
42%synergy
Sylvan Library
50%inclusion3 decks6 decks
41%synergy
Necropotence
47%inclusion35 decks75 decks
41%synergy
Rhystic Study
45%inclusion5 decks11 decks
21%synergy
Mystic Remora
36%inclusion4 decks11 decks
20%synergy
Goblin Bombardment
32%inclusion32 decks101 decks
26%synergy
Animate Dead
19%inclusion14 decks75 decks
10%synergy
Impact Tremors
15%inclusion15 decks101 decks
5%synergy
Carnival of Souls
13%inclusion10 decks75 decks
13%synergy
Sneak Attack
6.9%inclusion7 decks101 decks
5%synergy
Dance of the Dead
6.7%inclusion5 decks75 decks
5%synergy
Tortured Existence
6.7%inclusion5 decks75 decks
5%synergy
Blood Moon
5.9%inclusion6 decks101 decks
3%synergy
Heartless Summoning
5.3%inclusion4 decks75 decks
4%synergy
Necromancy
5.3%inclusion4 decks75 decks
2%synergy
Powerbalance
5.2%inclusion5 decks97 decks
4%synergy
Utility Lands
Shifting Woodland
67%inclusion4 decks6 decks
60%synergy
Crystal Vein
35%inclusion35 decks101 decks
34%synergy
Emergence Zone
29%inclusion29 decks101 decks
26%synergy
Eiganjo, Seat of the Empire
24%inclusion4 decks17 decks
16%synergy
Urza's Saga
21%inclusion21 decks101 decks
14%synergy
Ancient Den
18%inclusion3 decks17 decks
12%synergy
Buried Ruin
16%inclusion16 decks101 decks
11%synergy
Urborg, Tomb of Yawgmoth
14%inclusion14 decks101 decks
5%synergy
Takenuma, Abandoned Mire
13%inclusion10 decks75 decks
4%synergy
Bojuka Bog
12%inclusion9 decks75 decks
-18%synergy
Vault of Whispers
11%inclusion8 decks75 decks
6%synergy
Inventors' Fair
10%inclusion10 decks101 decks
6%synergy
Spymaster's Vault
10%inclusion7 decks73 decks
7%synergy
City of Traitors
8.9%inclusion9 decks101 decks
8%synergy
High Market
8.9%inclusion9 decks101 decks
6%synergy
Reliquary Tower
8.9%inclusion9 decks101 decks
-21%synergy
Great Furnace
7.9%inclusion8 decks101 decks
2%synergy
Mana Artifacts
Sol Ring
97%inclusion98 decks101 decks
13%synergy
Arcane Signet
84%inclusion85 decks101 decks
12%synergy
Talisman of Indulgence
75%inclusion56 decks75 decks
47%synergy
Lotus Petal
72%inclusion73 decks101 decks
65%synergy
Talisman of Dominance
50%inclusion3 decks6 decks
17%synergy
Boros Signet
41%inclusion7 decks17 decks
21%synergy
Talisman of Creativity
36%inclusion4 decks11 decks
8%synergy
Talisman of Conviction
35%inclusion6 decks17 decks
11%synergy
Grim Monolith
34%inclusion34 decks101 decks
32%synergy
Mox Opal
33%inclusion33 decks101 decks
28%synergy
Izzet Signet
27%inclusion3 decks11 decks
2%synergy
Fellwar Stone
27%inclusion27 decks101 decks
6%synergy
Mox Diamond
26%inclusion26 decks101 decks
21%synergy
Rakdos Signet
23%inclusion17 decks75 decks
-3%synergy
Mox Amber
17%inclusion17 decks101 decks
12%synergy
Springleaf Drum
12%inclusion12 decks101 decks
10%synergy
Mind Stone
12%inclusion12 decks101 decks
-3%synergy
The Soul Stone
11%inclusion4 decks35 decks
7%synergy
Mana Crypt
10%inclusion10 decks101 decks
7%synergy
Cursed Mirror
7.9%inclusion8 decks101 decks
2%synergy
Chromatic Star
6.9%inclusion7 decks101 decks
6%synergy
Jeweled Lotus
6.9%inclusion7 decks101 decks
5%synergy
Paradise Mantle
5.9%inclusion6 decks101 decks
5%synergy
Basalt Monolith
5.9%inclusion6 decks101 decks
3%synergy
Lands
Command Tower
84%inclusion85 decks101 decks
10%synergy
Sulfurous Springs
83%inclusion62 decks75 decks
59%synergy
Blood Crypt
83%inclusion62 decks75 decks
45%synergy
Luxury Suite
77%inclusion58 decks75 decks
53%synergy
Underground River
67%inclusion4 decks6 decks
44%synergy
Stomping Ground
67%inclusion4 decks6 decks
26%synergy
Watery Grave
67%inclusion4 decks6 decks
26%synergy
Bloodstained Mire
65%inclusion66 decks101 decks
54%synergy
Battlefield Forge
65%inclusion11 decks17 decks
36%synergy
Sacred Foundry
65%inclusion11 decks17 decks
29%synergy
Blazemire Verge
59%inclusion42 decks71 decks
48%synergy
Mount Doom
57%inclusion43 decks75 decks
51%synergy
City of Brass
56%inclusion57 decks101 decks
49%synergy
Shivan Reef
55%inclusion6 decks11 decks
25%synergy
Steam Vents
55%inclusion6 decks11 decks
17%synergy
Arid Mesa
54%inclusion55 decks101 decks
44%synergy
Raucous Theater
53%inclusion39 decks74 decks
43%synergy
Marsh Flats
52%inclusion53 decks101 decks
42%synergy
Wooded Foothills
51%inclusion52 decks101 decks
41%synergy
Karplusan Forest
50%inclusion3 decks6 decks
30%synergy
Morphic Pool
50%inclusion3 decks6 decks
25%synergy
Caves of Koilos
50%inclusion3 decks6 decks
21%synergy
Godless Shrine
50%inclusion3 decks6 decks
9%synergy
Scalding Tarn
50%inclusion50 decks101 decks
39%synergy
Badlands
49%inclusion37 decks75 decks
36%synergy
Spectator Seating
47%inclusion8 decks17 decks
24%synergy
Mana Confluence
47%inclusion47 decks101 decks
40%synergy
Polluted Delta
46%inclusion46 decks101 decks
34%synergy
Verdant Catacombs
42%inclusion42 decks101 decks
31%synergy
Plateau
41%inclusion7 decks17 decks
29%synergy
Gemstone Caverns
38%inclusion38 decks101 decks
33%synergy
Thundering Falls
36%inclusion4 decks11 decks
27%synergy
Training Center
36%inclusion4 decks11 decks
11%synergy
Cavern of Souls
36%inclusion36 decks101 decks
28%synergy
Graven Cairns
31%inclusion23 decks75 decks
21%synergy
Starting Town
30%inclusion18 decks60 decks
28%synergy
Sunbaked Canyon
29%inclusion5 decks17 decks
25%synergy
Clifftop Retreat
29%inclusion5 decks17 decks
-5%synergy
Exotic Orchard
25%inclusion25 decks101 decks
-12%synergy
Dragonskull Summit
24%inclusion18 decks75 decks
-10%synergy
Inspiring Vantage
24%inclusion4 decks17 decks
19%synergy
Needleverge Pathway
24%inclusion4 decks17 decks
16%synergy
Smoldering Marsh
16%inclusion12 decks75 decks
-18%synergy
Spire of Industry
14%inclusion14 decks101 decks
11%synergy
Blackcleave Cliffs
13%inclusion10 decks75 decks
7%synergy
Blightstep Pathway
11%inclusion8 decks75 decks
2%synergy
Shadowblood Ridge
11%inclusion8 decks75 decks
-2%synergy
Prismatic Vista
10%inclusion10 decks101 decks
5%synergy
Talon Gates of Madara
9.4%inclusion9 decks96 decks
7%synergy
Rakdos Carnarium
9.3%inclusion7 decks75 decks
-3%synergy