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%inclusion52 decks5.42K decks
Garna, the Bloodflame
2.9%inclusion7 decks238 decks
Gerrard, Weatherlight Hero
0.6%inclusion3 decks488 decks
Herigast, Erupting Nullkite
0.1%inclusion3 decks4.26K decks
Koll, the Forgemaster
0.2%inclusion3 decks1.21K decks
Birgi, God of Storytelling
0.1%inclusion2 decks1.47K decks
Dargo, the Shipwrecker // Tevesh Szat, Doom of Fools
0.4%inclusion2 decks478 decks
Flubs, the Fool
0.0%inclusion1 decks18.8K decks
Deadpool, Trading Card
0.0%inclusion1 decks12.6K decks
The Locust God
0.0%inclusion1 decks6.36K decks
Dargo, the Shipwrecker // Silas Renn, Seeker Adept
0.2%inclusion1 decks529 decks
Kefka, Court Mage
0.0%inclusion1 decks17.3K decks
Grenzo, Dungeon Warden
0.0%inclusion1 decks4.03K decks
Zinnia, Valley's Voice
0.0%inclusion1 decks14.6K decks
Arbaaz Mir
0.1%inclusion1 decks1.61K decks
Urabrask
0.0%inclusion1 decks3.65K decks
Dargo, the Shipwrecker // Tymna the Weaver
0.1%inclusion1 decks1.33K decks
Wolverine, Best There Is
0.0%inclusion1 decks9.45K decks
New Cards
The Last Agni Kai
20%inclusion3 decks15 decks
16%synergy
Redirect Lightning
8.3%inclusion3 decks36 decks
4%synergy
Desperate Plea
7.1%inclusion1 decks14 decks
7%synergy
Longshot, Rebel Bowman
6.7%inclusion1 decks15 decks
5%synergy
High Synergy Cards
Priest of Gix
78%inclusion60 decks77 decks
77%synergy
Culling the Weak
81%inclusion62 decks77 decks
76%synergy
Warren Soultrader
80%inclusion60 decks75 decks
74%synergy
Burnt Offering
75%inclusion58 decks77 decks
73%synergy
Sacrifice
73%inclusion56 decks77 decks
72%synergy
Shriekmaw
73%inclusion56 decks77 decks
71%synergy
Cabal Ritual
74%inclusion57 decks77 decks
69%synergy
Ashnod's Altar
75%inclusion77 decks103 decks
68%synergy
Phyrexian Tower
77%inclusion59 decks77 decks
68%synergy
Viscera Seer
75%inclusion58 decks77 decks
67%synergy
Top Cards
Dark Ritual
84%inclusion65 decks77 decks
60%synergy
Swords to Plowshares
82%inclusion14 decks17 decks
21%synergy
Reanimate
77%inclusion59 decks77 decks
58%synergy
Diabolic Intent
73%inclusion56 decks77 decks
65%synergy
Path to Exile
71%inclusion12 decks17 decks
23%synergy
Chthonian Nightmare
68%inclusion51 decks75 decks
66%synergy
Phyrexian Altar
68%inclusion70 decks103 decks
64%synergy
Entomb
68%inclusion52 decks77 decks
61%synergy
Lotho, Corrupt Shirriff
67%inclusion4 decks6 decks
54%synergy
Birds of Paradise
67%inclusion4 decks6 decks
39%synergy
Game Changers
Demonic Tutor
71%inclusion55 decks77 decks
52%synergy
Vampiric Tutor
69%inclusion53 decks77 decks
53%synergy
Thassa's Oracle
64%inclusion7 decks11 decks
57%synergy
Ancient Tomb
60%inclusion62 decks103 decks
51%synergy
Gamble
58%inclusion60 decks103 decks
49%synergy
Mana Vault
57%inclusion59 decks103 decks
51%synergy
Chrome Mox
56%inclusion58 decks103 decks
50%synergy
Orcish Bowmasters
55%inclusion42 decks77 decks
46%synergy
Mystical Tutor
55%inclusion6 decks11 decks
42%synergy
Lion's Eye Diamond
50%inclusion51 decks103 decks
48%synergy
Creatures
Ignoble Hierarch
75%inclusion3 decks4 decks
51%synergy
Poxwalkers
66%inclusion51 decks77 decks
66%synergy
Forsaken Miner
66%inclusion50 decks76 decks
65%synergy
Grief
65%inclusion50 decks77 decks
65%synergy
K'rrik, Son of Yawgmoth
62%inclusion48 decks77 decks
60%synergy
Priest of Urabrask
61%inclusion63 decks103 decks
61%synergy
Golgari Thug
61%inclusion47 decks77 decks
60%synergy
Blood Pet
61%inclusion47 decks77 decks
60%synergy
Greedy Freebooter
61%inclusion47 decks77 decks
60%synergy
Grand Abolisher
59%inclusion10 decks17 decks
50%synergy
Esper Sentinel
59%inclusion10 decks17 decks
40%synergy
Reckless Barbarian
57%inclusion59 decks103 decks
56%synergy
Umbral Collar Zealot
56%inclusion23 decks41 decks
53%synergy
Impulsive Pilferer
54%inclusion56 decks103 decks
52%synergy
Ingot Chewer
53%inclusion55 decks103 decks
53%synergy
Shambling Ghast
53%inclusion41 decks77 decks
52%synergy
Ragavan, Nimble Pilferer
52%inclusion54 decks103 decks
45%synergy
Boggart Trawler
52%inclusion39 decks75 decks
48%synergy
Fury
51%inclusion53 decks103 decks
50%synergy
Simian Spirit Guide
51%inclusion53 decks103 decks
46%synergy
Elvish Spirit Guide
50%inclusion3 decks6 decks
46%synergy
Eternal Witness
50%inclusion3 decks6 decks
33%synergy
Mindslicer
48%inclusion37 decks77 decks
47%synergy
Timeline Culler
48%inclusion20 decks42 decks
47%synergy
Birgi, God of Storytelling
48%inclusion49 decks103 decks
42%synergy
Sephiroth, Fabled SOLDIER
47%inclusion28 decks59 decks
45%synergy
Archivist of Oghma
47%inclusion8 decks17 decks
42%synergy
Pinnacle Monk
46%inclusion46 decks99 decks
42%synergy
Laboratory Maniac
45%inclusion5 decks11 decks
41%synergy
Dargo, the Shipwrecker
45%inclusion46 decks103 decks
44%synergy
Blood Artist
43%inclusion33 decks77 decks
31%synergy
Dualcaster Mage
43%inclusion44 decks103 decks
38%synergy
Pitiless Plunderer
42%inclusion32 decks77 decks
33%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
Party Thrasher
40%inclusion40 decks99 decks
39%synergy
Deadpool, Trading Card
40%inclusion25 decks63 decks
37%synergy
Flamekin Harbinger
36%inclusion37 decks103 decks
36%synergy
Skittering Precursor
31%inclusion31 decks99 decks
31%synergy
Oswald Fiddlebender
29%inclusion5 decks17 decks
28%synergy
Charming Scoundrel
29%inclusion30 decks103 decks
28%synergy
Imperial Recruiter
28%inclusion29 decks103 decks
23%synergy
Carrion Feeder
27%inclusion21 decks77 decks
23%synergy
Mayhem Devil
27%inclusion21 decks77 decks
17%synergy
Atsushi, the Blazing Sky
24%inclusion25 decks103 decks
22%synergy
Goblin Engineer
24%inclusion25 decks103 decks
21%synergy
Teshar, Ancestor's Apostle
24%inclusion4 decks17 decks
22%synergy
Aven Mindcensor
24%inclusion4 decks17 decks
20%synergy
Hoarding Broodlord
22%inclusion17 decks77 decks
20%synergy
Instants
Assassin's Trophy
75%inclusion3 decks4 decks
45%synergy
Red Elemental Blast
65%inclusion67 decks103 decks
59%synergy
Brain Freeze
64%inclusion7 decks11 decks
60%synergy
Swan Song
64%inclusion7 decks11 decks
46%synergy
Saw in Half
62%inclusion48 decks77 decks
58%synergy
Pyroblast
62%inclusion64 decks103 decks
56%synergy
Deflecting Swat
58%inclusion60 decks103 decks
42%synergy
Flare of Duplication
57%inclusion56 decks99 decks
54%synergy
Pact of Negation
55%inclusion6 decks11 decks
48%synergy
Deadly Rollick
55%inclusion42 decks77 decks
41%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
Songs of the Damned
45%inclusion35 decks77 decks
44%synergy
Frantic Search
45%inclusion5 decks11 decks
31%synergy
Counterspell
45%inclusion5 decks11 decks
4%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
27%inclusion20 decks75 decks
24%synergy
Untimely Malfunction
25%inclusion23 decks93 decks
17%synergy
Chaos Warp
19%inclusion20 decks103 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
Tibalt's Trickery
17%inclusion18 decks103 decks
13%synergy
Deadly Dispute
16%inclusion12 decks77 decks
3%synergy
Lightning Bolt
15%inclusion15 decks103 decks
3%synergy
Withering Torment
14%inclusion10 decks73 decks
6%synergy
Final Fortune
12%inclusion12 decks103 decks
10%synergy
Desperate Ritual
12%inclusion12 decks103 decks
9%synergy
Pyretic Ritual
12%inclusion12 decks103 decks
9%synergy
Abrade
12%inclusion12 decks103 decks
0%synergy
Fell the Profane
11%inclusion8 decks75 decks
2%synergy
Imp's Mischief
10%inclusion8 decks77 decks
7%synergy
Seething Song
10%inclusion10 decks103 decks
4%synergy
Tainted Pact
7.8%inclusion6 decks77 decks
4%synergy
Bolt Bend
7.8%inclusion8 decks103 decks
4%synergy
Corrupted Conviction
6.5%inclusion5 decks77 decks
2%synergy
Valakut Awakening
5.8%inclusion6 decks103 decks
1%synergy
Mausoleum Secrets
5.2%inclusion4 decks77 decks
5%synergy
Dismember
5.2%inclusion4 decks77 decks
2%synergy
Sorceries
Sevinne's Reclamation
65%inclusion11 decks17 decks
57%synergy
Infernal Plunge
56%inclusion58 decks103 decks
55%synergy
Rite of Flame
54%inclusion56 decks103 decks
51%synergy
Eldritch Evolution
50%inclusion3 decks6 decks
46%synergy
Imperial Seal
44%inclusion34 decks77 decks
39%synergy
Jeska's Will
43%inclusion44 decks103 decks
27%synergy
Molten Duplication
33%inclusion33 decks101 decks
31%synergy
Windfall
27%inclusion3 decks11 decks
15%synergy
Cabal Therapy
23%inclusion18 decks77 decks
23%synergy
Wheel of Fortune
23%inclusion24 decks103 decks
18%synergy
Faithless Looting
23%inclusion24 decks103 decks
7%synergy
Grim Tutor
21%inclusion16 decks77 decks
17%synergy
Buried Alive
18%inclusion14 decks77 decks
12%synergy
Open the Armory
18%inclusion3 decks17 decks
13%synergy
Blasphemous Act
15%inclusion15 decks103 decks
-19%synergy
Twinflame
11%inclusion11 decks103 decks
8%synergy
Lively Dirge
11%inclusion8 decks76 decks
9%synergy
Feed the Swarm
10%inclusion8 decks77 decks
-6%synergy
Grapeshot
10%inclusion10 decks103 decks
6%synergy
Praetor's Grasp
9.1%inclusion7 decks77 decks
7%synergy
Living Death
9.1%inclusion7 decks77 decks
4%synergy
Victimize
9.1%inclusion7 decks77 decks
-3%synergy
Toxic Deluge
9.1%inclusion7 decks77 decks
-9%synergy
Burning Inquiry
8.7%inclusion9 decks103 decks
8%synergy
Reckless Handling
8.7%inclusion9 decks103 decks
7%synergy
Vandalblast
8.7%inclusion9 decks103 decks
-7%synergy
Unmarked Grave
7.8%inclusion6 decks77 decks
6%synergy
Agadeem's Awakening
7.8%inclusion6 decks77 decks
5%synergy
Beseech the Mirror
7.8%inclusion6 decks77 decks
5%synergy
Wheel of Misfortune
7.8%inclusion8 decks103 decks
5%synergy
Demonic Counsel
5.5%inclusion4 decks73 decks
4%synergy
Unearth
5.2%inclusion4 decks77 decks
2%synergy
Utility Artifacts
Wishclaw Talisman
51%inclusion39 decks77 decks
45%synergy
Jet Medallion
30%inclusion31 decks103 decks
27%synergy
Grinding Station
22%inclusion23 decks103 decks
22%synergy
The One Ring
22%inclusion23 decks103 decks
14%synergy
Skullclamp
19%inclusion20 decks103 decks
8%synergy
Sensei's Divining Top
14%inclusion14 decks103 decks
9%synergy
Lightning Greaves
12%inclusion12 decks103 decks
-13%synergy
Defense Grid
10%inclusion10 decks103 decks
9%synergy
Moonsilver Key
8.7%inclusion9 decks103 decks
8%synergy
Aetherflux Reservoir
8.7%inclusion9 decks103 decks
5%synergy
Ichor Wellspring
7.8%inclusion8 decks103 decks
6%synergy
Mystic Forge
7.8%inclusion8 decks103 decks
5%synergy
Vexing Bauble
7.1%inclusion7 decks99 decks
6%synergy
Blasting Station
6.8%inclusion7 decks103 decks
6%synergy
Semblance Anvil
6.8%inclusion7 decks103 decks
6%synergy
Krark-Clan Ironworks
6.8%inclusion7 decks103 decks
6%synergy
Ruby Medallion
6.8%inclusion7 decks103 decks
3%synergy
Swiftfoot Boots
6.8%inclusion7 decks103 decks
-20%synergy
Bolas's Citadel
6.5%inclusion5 decks77 decks
-2%synergy
Nim Deathmantle
5.8%inclusion6 decks103 decks
5%synergy
Cloudstone Curio
5.8%inclusion6 decks103 decks
5%synergy
Hazoret's Monument
5.8%inclusion6 decks103 decks
5%synergy
Altar of the Brood
5.8%inclusion6 decks103 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%inclusion36 decks77 decks
41%synergy
Rhystic Study
45%inclusion5 decks11 decks
21%synergy
Mystic Remora
36%inclusion4 decks11 decks
20%synergy
Goblin Bombardment
31%inclusion32 decks103 decks
25%synergy
Animate Dead
21%inclusion16 decks77 decks
12%synergy
Impact Tremors
15%inclusion15 decks103 decks
5%synergy
Carnival of Souls
13%inclusion10 decks77 decks
13%synergy
Sneak Attack
6.8%inclusion7 decks103 decks
5%synergy
Blood Moon
6.8%inclusion7 decks103 decks
4%synergy
Dance of the Dead
6.5%inclusion5 decks77 decks
5%synergy
Tortured Existence
6.5%inclusion5 decks77 decks
5%synergy
Heartless Summoning
5.2%inclusion4 decks77 decks
4%synergy
Necromancy
5.2%inclusion4 decks77 decks
2%synergy
Powerbalance
5.1%inclusion5 decks99 decks
3%synergy
Utility Lands
Shifting Woodland
67%inclusion4 decks6 decks
60%synergy
Crystal Vein
33%inclusion34 decks103 decks
32%synergy
Emergence Zone
29%inclusion30 decks103 decks
27%synergy
Eiganjo, Seat of the Empire
24%inclusion4 decks17 decks
16%synergy
Urza's Saga
20%inclusion21 decks103 decks
13%synergy
Ancient Den
18%inclusion3 decks17 decks
12%synergy
Buried Ruin
16%inclusion16 decks103 decks
11%synergy
Takenuma, Abandoned Mire
14%inclusion11 decks77 decks
5%synergy
Urborg, Tomb of Yawgmoth
14%inclusion14 decks103 decks
5%synergy
Bojuka Bog
12%inclusion9 decks77 decks
-18%synergy
City of Traitors
11%inclusion11 decks103 decks
10%synergy
Vault of Whispers
10%inclusion8 decks77 decks
6%synergy
Inventors' Fair
10%inclusion10 decks103 decks
6%synergy
High Market
8.7%inclusion9 decks103 decks
6%synergy
Reliquary Tower
8.7%inclusion9 decks103 decks
-21%synergy
Spymaster's Vault
8.0%inclusion6 decks75 decks
5%synergy
Great Furnace
7.8%inclusion8 decks103 decks
2%synergy
Mana Artifacts
Sol Ring
97%inclusion100 decks103 decks
13%synergy
Arcane Signet
84%inclusion87 decks103 decks
12%synergy
Talisman of Indulgence
75%inclusion58 decks77 decks
47%synergy
Lotus Petal
73%inclusion75 decks103 decks
66%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
35%inclusion36 decks103 decks
33%synergy
Mox Opal
33%inclusion34 decks103 decks
29%synergy
Izzet Signet
27%inclusion3 decks11 decks
3%synergy
Mox Diamond
27%inclusion28 decks103 decks
23%synergy
Fellwar Stone
27%inclusion28 decks103 decks
7%synergy
Rakdos Signet
19%inclusion15 decks77 decks
-6%synergy
Mox Amber
16%inclusion16 decks103 decks
11%synergy
Mind Stone
12%inclusion12 decks103 decks
-3%synergy
Springleaf Drum
11%inclusion11 decks103 decks
9%synergy
The Soul Stone
11%inclusion4 decks38 decks
6%synergy
Mana Crypt
10%inclusion10 decks103 decks
7%synergy
Cursed Mirror
7.8%inclusion8 decks103 decks
2%synergy
Chromatic Star
6.8%inclusion7 decks103 decks
6%synergy
Jeweled Lotus
6.8%inclusion7 decks103 decks
5%synergy
Paradise Mantle
5.8%inclusion6 decks103 decks
5%synergy
Basalt Monolith
5.8%inclusion6 decks103 decks
3%synergy
Lands
Command Tower
84%inclusion87 decks103 decks
10%synergy
Sulfurous Springs
83%inclusion64 decks77 decks
60%synergy
Blood Crypt
83%inclusion64 decks77 decks
46%synergy
Luxury Suite
78%inclusion60 decks77 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
66%inclusion68 decks103 decks
55%synergy
Battlefield Forge
65%inclusion11 decks17 decks
36%synergy
Sacred Foundry
65%inclusion11 decks17 decks
28%synergy
Mount Doom
60%inclusion46 decks77 decks
54%synergy
Blazemire Verge
59%inclusion43 decks73 decks
48%synergy
City of Brass
57%inclusion59 decks103 decks
50%synergy
Shivan Reef
55%inclusion6 decks11 decks
25%synergy
Steam Vents
55%inclusion6 decks11 decks
17%synergy
Arid Mesa
54%inclusion56 decks103 decks
44%synergy
Raucous Theater
53%inclusion40 decks76 decks
42%synergy
Marsh Flats
52%inclusion54 decks103 decks
42%synergy
Badlands
52%inclusion40 decks77 decks
39%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
Wooded Foothills
50%inclusion51 decks103 decks
39%synergy
Scalding Tarn
49%inclusion50 decks103 decks
38%synergy
Mana Confluence
48%inclusion49 decks103 decks
41%synergy
Spectator Seating
47%inclusion8 decks17 decks
24%synergy
Polluted Delta
46%inclusion47 decks103 decks
34%synergy
Verdant Catacombs
42%inclusion43 decks103 decks
31%synergy
Plateau
41%inclusion7 decks17 decks
29%synergy
Gemstone Caverns
37%inclusion38 decks103 decks
32%synergy
Thundering Falls
36%inclusion4 decks11 decks
27%synergy
Training Center
36%inclusion4 decks11 decks
11%synergy
Cavern of Souls
36%inclusion37 decks103 decks
29%synergy
Graven Cairns
30%inclusion23 decks77 decks
20%synergy
Sunbaked Canyon
29%inclusion5 decks17 decks
25%synergy
Clifftop Retreat
29%inclusion5 decks17 decks
-5%synergy
Starting Town
29%inclusion18 decks62 decks
27%synergy
Exotic Orchard
24%inclusion25 decks103 decks
-12%synergy
Inspiring Vantage
24%inclusion4 decks17 decks
19%synergy
Needleverge Pathway
24%inclusion4 decks17 decks
16%synergy
Dragonskull Summit
23%inclusion18 decks77 decks
-11%synergy
Smoldering Marsh
16%inclusion12 decks77 decks
-18%synergy
Spire of Industry
14%inclusion14 decks103 decks
10%synergy
Blackcleave Cliffs
13%inclusion10 decks77 decks
7%synergy
Blightstep Pathway
12%inclusion9 decks77 decks
4%synergy
Shadowblood Ridge
10%inclusion8 decks77 decks
-2%synergy
Talon Gates of Madara
10%inclusion10 decks98 decks
8%synergy
Prismatic Vista
10%inclusion10 decks103 decks
5%synergy
Lazotep Quarry
9.2%inclusion9 decks98 decks
8%synergy