Marneus Calgar
The Watcher in the Water

   Prerequisites

What do I need to start this combo?
Marneus Calgar and The Watcher in the Water on the battlefield.
You have a way to draw a card during an opponent's turn. You have a way to interrupt the loop after drawing your library.

   Steps

How does this combo work?
1
Draw a card during an opponent's turn by triggering Marneus Calgar using his activated ability, or by any other method.
2
The Watcher in the Water triggers, creating a 1/1 Tentacle creature token.
3
When the Tentacle enters the battlefield, Marneus Calgar triggers, causing you to draw a card.
4
Repeat from step 2.
5
After drawing any number of cards, interrupt the mandatory infinite loop by winning the game or removing a combo piece in response to a trigger.

   Results

What do I get from this combo?
Infinite card draw
Infinite draw triggers
Near-infinite creature tokens
Near-infinite ETB
Inquisitor Greyfax
0.4%inclusion10 decks2.49K decks
Tivit, Seller of Secrets
0.0%inclusion3 decks12.7K decks
Soundwave, Sonic Spy
0.1%inclusion3 decks2.05K decks
Queza, Augur of Agonies
0.0%inclusion3 decks8.86K decks
Kraum, Ludevic's Opus // Tymna the Weaver
0.0%inclusion3 decks11.3K decks
Noctis, Prince of Lucis
0.0%inclusion2 decks7.91K decks
Temmet, Naktamun's Will
0.0%inclusion1 decks12.5K decks
The Celestial Toymaker
0.0%inclusion1 decks3.16K decks
Alela, Artful Provocateur
0.0%inclusion1 decks15.8K decks
Atraxa, Grand Unifier
0.0%inclusion1 decks16.9K decks
G'raha Tia, Scion Reborn
0.0%inclusion1 decks3.93K decks
The Wandering Minstrel
0.0%inclusion1 decks16.9K decks
Ravos, Soultender // Sakashima of a Thousand Faces
0.4%inclusion1 decks281 decks
Hargilde, Kindly Runechanter // Wernog, Rider's Chaplain
0.1%inclusion1 decks1.01K decks
Hashaton, Scarab's Fist
0.0%inclusion1 decks23.8K decks
Ertai, the Corrupted
0.1%inclusion1 decks1.08K decks
Zur the Enchanter
0.0%inclusion1 decks15.7K decks
Kraum, Ludevic's Opus // Ravos, Soultender
0.4%inclusion1 decks274 decks
Esika, God of the Tree
0.0%inclusion1 decks24.2K decks
New Cards
Emeritus of Woe
7.4%inclusion4 decks54 decks
Emeritus of Truce
7.1%inclusion4 decks56 decks
Erode
5.0%inclusion3 decks60 decks
Defacing Duskmage
4.8%inclusion3 decks62 decks
Silverquill, the Disputant
4.8%inclusion3 decks62 decks
High Synergy Cards
Nadir Kraken
70%inclusion314 decks450 decks
Ashnod's Altar
68%inclusion307 decks450 decks
Kambal, Profiteering Mayor
58%inclusion260 decks450 decks
Lotho, Corrupt Shirriff
62%inclusion278 decks450 decks
Pitiless Plunderer
54%inclusion241 decks450 decks
Mirkwood Bats
52%inclusion234 decks450 decks
Prince Imrahil the Fair
39%inclusion174 decks450 decks
Warren Soultrader
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Training Grounds
37%inclusion167 decks450 decks
Skullclamp
45%inclusion202 decks450 decks
Top Cards
Swords to Plowshares
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Path to Exile
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Counterspell
42%inclusion187 decks450 decks
An Offer You Can't Refuse
41%inclusion186 decks450 decks
Mondrak, Glory Dominus
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Black Market Connections
37%inclusion165 decks450 decks
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36%inclusion163 decks450 decks
Charismatic Conqueror
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Esper Sentinel
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Elas il-Kor, Sadistic Pilgrim
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Game Changers
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Demonic Tutor
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Enlightened Tutor
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Thassa's Oracle
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Ancient Tomb
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The One Ring
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Mana Vault
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Chrome Mox
17%inclusion75 decks450 decks
Creatures
Nekusar, the Mindrazer
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The Locust God
50%inclusion3 decks6 decks
Voice of Victory
32%inclusion90 decks282 decks
Grim Hireling
30%inclusion136 decks450 decks
Adeline, Resplendent Cathar
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Space Marine Devastator
30%inclusion133 decks450 decks
Ultramarines Honour Guard
29%inclusion131 decks450 decks
Emrakul's Messenger
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Commissar Severina Raine
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Vexilus Praetor
27%inclusion121 decks450 decks
Company Commander
27%inclusion120 decks450 decks
Homunculus Horde
25%inclusion94 decks370 decks
Vanguard Suppressor
24%inclusion107 decks450 decks
Sicarian Infiltrator
23%inclusion105 decks450 decks
Faerie Artisans
23%inclusion104 decks450 decks
Laboratory Maniac
23%inclusion103 decks450 decks
Tataru Taru
23%inclusion56 decks248 decks
Monastery Mentor
22%inclusion101 decks450 decks
Inquisitor Greyfax
22%inclusion99 decks450 decks
Thalisse, Reverent Medium
22%inclusion97 decks450 decks
Zulaport Cutthroat
21%inclusion96 decks450 decks
Grand Abolisher
21%inclusion96 decks450 decks
Corpse Knight
21%inclusion93 decks450 decks
Ojer Taq, Deepest Foundation
20%inclusion92 decks450 decks
Chasm Skulker
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Stridehangar Automaton
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Faerie Mastermind
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Tivit, Seller of Secrets
18%inclusion80 decks450 decks
Mischievous Mystic
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Ethereal Investigator
17%inclusion76 decks450 decks
Junk Winder
17%inclusion75 decks450 decks
Ocelot Pride
17%inclusion75 decks450 decks
Bastion Protector
17%inclusion75 decks450 decks
Ophiomancer
16%inclusion71 decks450 decks
Exalted Sunborn
16%inclusion32 decks206 decks
Nadier's Nightblade
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Academy Manufactor
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Hullbreaker Horror
15%inclusion66 decks450 decks
Zephyrim
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Psychosis Crawler
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Drannith Magistrate
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Blood Artist
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Ranger-Captain of Eos
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Sanguinary Priest
13%inclusion59 decks450 decks
Marionette Apprentice
13%inclusion59 decks450 decks
Minn, Wily Illusionist
13%inclusion57 decks450 decks
Myrel, Shield of Argive
12%inclusion56 decks450 decks
Jadar, Ghoulcaller of Nephalia
12%inclusion55 decks450 decks
Forensic Gadgeteer
12%inclusion53 decks450 decks
Epistolary Librarian
11%inclusion51 decks450 decks
Instants
Cyclonic Rift
30%inclusion133 decks450 decks
Fierce Guardianship
28%inclusion125 decks450 decks
Swan Song
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Dovin's Veto
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Deny the Witch
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Vampiric Tutor
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Mana Drain
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Anguished Unmaking
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Mortify
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Void Rend
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Silence
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Force of Will
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Borne Upon a Wind
19%inclusion86 decks450 decks
Inkshield
19%inclusion84 decks450 decks
Teferi's Protection
19%inclusion84 decks450 decks
Arcane Denial
18%inclusion82 decks450 decks
Deadly Dispute
18%inclusion81 decks450 decks
Demonic Consultation
18%inclusion80 decks450 decks
Force of Negation
17%inclusion78 decks450 decks
Mystical Tutor
17%inclusion76 decks450 decks
Flusterstorm
16%inclusion73 decks450 decks
Utter End
16%inclusion72 decks450 decks
Negate
15%inclusion67 decks450 decks
Deadly Rollick
15%inclusion66 decks450 decks
Pact of Negation
14%inclusion65 decks450 decks
Tainted Pact
14%inclusion64 decks450 decks
Entrapment Maneuver
14%inclusion62 decks450 decks
Generous Gift
14%inclusion62 decks450 decks
Mindbreak Trap
13%inclusion60 decks450 decks
Mental Misstep
13%inclusion59 decks450 decks
And They Shall Know No Fear
13%inclusion58 decks450 decks
Officious Interrogation
12%inclusion55 decks450 decks
Sink into Stupor
12%inclusion54 decks450 decks
Flawless Maneuver
12%inclusion53 decks450 decks
Dramatic Reversal
11%inclusion51 decks450 decks
Protect the Negotiators
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Akroma's Will
8.9%inclusion40 decks450 decks
Fell the Profane
8.4%inclusion38 decks450 decks
Despark
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Clever Concealment
7.6%inclusion34 decks450 decks
Brainstorm
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Muddle the Mixture
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Rootborn Defenses
6.9%inclusion31 decks450 decks
Grand Crescendo
6.7%inclusion30 decks450 decks
Stroke of Midnight
6.7%inclusion30 decks450 decks
Chain of Vapor
6.4%inclusion29 decks450 decks
Into the Flood Maw
6.0%inclusion26 decks432 decks
Secure the Wastes
6.0%inclusion27 decks450 decks
Strix Serenade
5.8%inclusion26 decks450 decks
Malakir Rebirth
5.6%inclusion25 decks450 decks
Sorceries
Martial Coup
22%inclusion99 decks450 decks
Hour of Reckoning
21%inclusion95 decks450 decks
Toxic Deluge
20%inclusion88 decks450 decks
Diabolic Intent
19%inclusion84 decks450 decks
Damn
17%inclusion76 decks450 decks
Collective Effort
15%inclusion68 decks450 decks
Farewell
15%inclusion67 decks450 decks
Imperial Seal
14%inclusion65 decks450 decks
Exterminatus
14%inclusion64 decks450 decks
Launch the Fleet
14%inclusion62 decks450 decks
Sevinne's Reclamation
13%inclusion60 decks450 decks
For the Emperor!
13%inclusion57 decks450 decks
Reanimate
12%inclusion55 decks450 decks
Fell the Mighty
11%inclusion51 decks450 decks
Beseech the Mirror
11%inclusion51 decks450 decks
Supreme Verdict
10%inclusion45 decks450 decks
Windfall
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Deploy to the Front
7.3%inclusion33 decks450 decks
Fabricate
7.1%inclusion32 decks450 decks
Austere Command
5.8%inclusion26 decks450 decks
Irenicus's Vile Duplication
5.3%inclusion24 decks450 decks
Utility Artifacts
Shorikai, Genesis Engine
27%inclusion120 decks450 decks
Phyrexian Altar
26%inclusion118 decks450 decks
Lightning Greaves
26%inclusion118 decks450 decks
The Golden Throne
25%inclusion114 decks450 decks
Inquisitorial Rosette
20%inclusion91 decks450 decks
Swiftfoot Boots
20%inclusion88 decks450 decks
Thunderhawk Gunship
16%inclusion72 decks450 decks
Oketra's Monument
16%inclusion71 decks450 decks
Wishclaw Talisman
14%inclusion62 decks450 decks
Time Sieve
14%inclusion61 decks450 decks
Rings of Brighthearth
10%inclusion47 decks450 decks
Isochron Scepter
10%inclusion43 decks450 decks
Thopter Fabricator
8.8%inclusion29 decks329 decks
Idol of Oblivion
8.7%inclusion39 decks450 decks
Tamiyo's Journal
6.2%inclusion28 decks450 decks
Illusionist's Bracers
6.2%inclusion28 decks450 decks
Wayfarer's Bauble
6.2%inclusion28 decks450 decks
Halo Fountain
5.6%inclusion25 decks450 decks
Thousand Moons Smithy
5.3%inclusion24 decks450 decks
Enchantments
Impact Tremors
50%inclusion3 decks6 decks
Anointed Procession
29%inclusion129 decks450 decks
Mystic Remora
26%inclusion119 decks450 decks
Monologue Tax
25%inclusion114 decks450 decks
Bitterblossom
24%inclusion110 decks450 decks
Bastion of Remembrance
21%inclusion93 decks450 decks
Scuttletide
20%inclusion88 decks450 decks
Caretaker's Talent
17%inclusion72 decks429 decks
Skrelv's Hive
17%inclusion75 decks450 decks
Birth of the Imperium
15%inclusion67 decks450 decks
Amphibian Downpour
15%inclusion67 decks450 decks
Felidar Retreat
12%inclusion56 decks450 decks
Defenders of Humanity
12%inclusion55 decks450 decks
Ominous Seas
11%inclusion51 decks450 decks
Reconnaissance Mission
10%inclusion47 decks450 decks
Blind Obedience
10%inclusion43 decks450 decks
Intangible Virtue
8.9%inclusion40 decks450 decks
Divine Visitation
8.2%inclusion37 decks450 decks
Chivalric Alliance
7.6%inclusion34 decks450 decks
Teferi's Ageless Insight
7.6%inclusion34 decks450 decks
Moonlit Meditation
7.4%inclusion15 decks202 decks
Revel in Riches
7.1%inclusion32 decks450 decks
Obsessive Pursuit
6.6%inclusion9 decks137 decks
Propaganda
6.2%inclusion28 decks450 decks
Court of Grace
6.0%inclusion27 decks450 decks
Mechanized Production
6.0%inclusion27 decks450 decks
The Meathook Massacre
6.0%inclusion27 decks450 decks
Trouble in Pairs
5.8%inclusion26 decks450 decks
Endless Foot Assault
5.7%inclusion5 decks87 decks
Smuggler's Share
5.6%inclusion25 decks450 decks
Legion's Landing
5.3%inclusion24 decks450 decks
Wizard Class
5.1%inclusion23 decks450 decks
Planeswalkers
Elspeth, Storm Slayer
19%inclusion53 decks282 decks
Elspeth, Sun's Champion
14%inclusion65 decks450 decks
Liliana, Dreadhorde General
12%inclusion52 decks450 decks
Teferi, Time Raveler
8.9%inclusion40 decks450 decks
Jace, Wielder of Mysteries
7.8%inclusion35 decks450 decks
Kaya, Geist Hunter
5.6%inclusion25 decks450 decks
Utility Lands
Reliquary Tower
54%inclusion244 decks450 decks
Otawara, Soaring City
24%inclusion108 decks450 decks
Bojuka Bog
21%inclusion96 decks450 decks
Urza's Saga
18%inclusion81 decks450 decks
Phyrexian Tower
14%inclusion61 decks450 decks
Castle Ardenvale
12%inclusion53 decks450 decks
Urborg, Tomb of Yawgmoth
11%inclusion50 decks450 decks
Field of the Dead
10%inclusion46 decks450 decks
Fountainport
8.4%inclusion36 decks430 decks
Memorial to Glory
8.0%inclusion36 decks450 decks
Vault of the Archangel
7.1%inclusion32 decks450 decks
Emergence Zone
6.9%inclusion31 decks450 decks
Temple of the False God
6.0%inclusion27 decks450 decks
Minamo, School at Water's Edge
5.8%inclusion26 decks450 decks
Mana Artifacts
Sol Ring
95%inclusion427 decks450 decks
Arcane Signet
93%inclusion418 decks450 decks
Talisman of Dominance
67%inclusion302 decks450 decks
Talisman of Progress
64%inclusion290 decks450 decks
Talisman of Hierarchy
59%inclusion267 decks450 decks
Thought Vessel
42%inclusion190 decks450 decks
Fellwar Stone
36%inclusion160 decks450 decks
Azorius Signet
26%inclusion115 decks450 decks
Dimir Signet
25%inclusion111 decks450 decks
Orzhov Signet
24%inclusion109 decks450 decks
Lotus Petal
18%inclusion79 decks450 decks
Mind Stone
18%inclusion79 decks450 decks
Commander's Sphere
16%inclusion71 decks450 decks
Mox Opal
15%inclusion69 decks450 decks
Decanter of Endless Water
15%inclusion66 decks450 decks
Basalt Monolith
14%inclusion64 decks450 decks
Mox Diamond
13%inclusion60 decks450 decks
Grim Monolith
8.4%inclusion38 decks450 decks
Chromatic Lantern
7.6%inclusion34 decks450 decks
Mox Amber
7.3%inclusion33 decks450 decks
Everflowing Chalice
6.7%inclusion30 decks450 decks
Lands
Command Tower
94%inclusion424 decks450 decks
Exotic Orchard
67%inclusion301 decks450 decks
Crumbling Necropolis
67%inclusion4 decks6 decks
Hallowed Fountain
57%inclusion257 decks450 decks
Godless Shrine
57%inclusion255 decks450 decks
Watery Grave
55%inclusion246 decks450 decks
Mystic Monastery
50%inclusion3 decks6 decks
Nomad Outpost
50%inclusion3 decks6 decks
Blood Crypt
50%inclusion3 decks6 decks
Arcane Sanctum
48%inclusion214 decks450 decks
Flooded Strand
46%inclusion205 decks450 decks
Prairie Stream
46%inclusion205 decks450 decks
Polluted Delta
45%inclusion204 decks450 decks
Marsh Flats
45%inclusion201 decks450 decks
Sunken Hollow
44%inclusion199 decks450 decks
Vault of Champions
40%inclusion181 decks450 decks
Sea of Clouds
40%inclusion180 decks450 decks
Morphic Pool
39%inclusion175 decks450 decks
Caves of Koilos
36%inclusion163 decks450 decks
Raffine's Tower
35%inclusion158 decks450 decks
Adarkar Wastes
30%inclusion137 decks450 decks
Isolated Chapel
29%inclusion132 decks450 decks
Skycloud Expanse
29%inclusion129 decks450 decks
Port Town
28%inclusion125 decks450 decks
Path of Ancestry
28%inclusion125 decks450 decks
Glacial Fortress
27%inclusion122 decks450 decks
Darkwater Catacombs
27%inclusion120 decks450 decks
Underground River
27%inclusion120 decks450 decks
Underground Sea
26%inclusion115 decks450 decks
Scrubland
25%inclusion112 decks450 decks
Tundra
25%inclusion111 decks450 decks
Choked Estuary
25%inclusion111 decks450 decks
City of Brass
24%inclusion108 decks450 decks
Drowned Catacomb
24%inclusion107 decks450 decks
Mana Confluence
22%inclusion98 decks450 decks
Evolving Wilds
21%inclusion93 decks450 decks
Shipwreck Marsh
20%inclusion92 decks450 decks
Scalding Tarn
20%inclusion91 decks450 decks
Misty Rainforest
20%inclusion90 decks450 decks
Deserted Beach
20%inclusion88 decks450 decks
Bloodstained Mire
19%inclusion85 decks450 decks
Terramorphic Expanse
19%inclusion84 decks450 decks
Verdant Catacombs
18%inclusion83 decks450 decks
Arid Mesa
18%inclusion80 decks450 decks
Windswept Heath
18%inclusion79 decks450 decks
Gemstone Caverns
17%inclusion76 decks450 decks
Shattered Sanctum
16%inclusion72 decks450 decks
Meticulous Archive
14%inclusion64 decks450 decks
Undercity Sewers
14%inclusion61 decks450 decks
Contaminated Landscape
13%inclusion59 decks450 decks