Feign Death + Dualcaster Mage + Phyrexian Altar
Feign Death
Dualcaster Mage
Phyrexian Altar
Requires
Feign Death must be in hand.
Dualcaster Mage must be in hand.
Phyrexian Altar must be on the battlefield.
Mana needed: 
Steps
- Cast Feign Death by paying , targeting any creature.
- Holding priority, cast Dualcaster Mage by paying .
- Dualcaster Mage enters the battlefield, creating a copy of Feign Death, targeting Dualcaster Mage.
- Resolve the copy of Feign Death, causing Dualcaster Mage to return to the battlefield tapped and with a +1/+1 counter on it when it dies this turn.
- Activate Phyrexian Altar by sacrificing Dualcaster Mage, adding one mana of any color.
- Dualcaster Mage triggers, returning itself to the battlefield tapped with a +1/+1 counter on it.
- Repeat from step 3.
Results
Infinite colored mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite magecraft triggers. Infinite sacrifice triggers.
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1.39% of 2021 decks
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Mindsplice Apparatus
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Mithril Coat
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Swiftfoot Boots
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Wayfarer's Bauble
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Cloudstone Curio
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Nim Deathmantle
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Isochron Scepter
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Conjurer's Closet
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Ruby Medallion
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+3% synergy
Enchantments
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+14% synergy
Goblin Bombardment
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+28% synergy
Mystic Remora
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+10% synergy
Animate Dead
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Underworld Breach
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+19% synergy
Chthonian Nightmare
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+19% synergy
Impact Tremors
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Fiery Inscription
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+13% synergy
Necropotence
16% of 123 decks
+11% synergy
Black Market Connections
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+5% synergy
Jace's Sanctum
14% of 36 decks
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Intruder Alarm
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Thousand-Year Storm
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Necromancy
10% of 123 decks
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Phyrexian Arena
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Reflections of Littjara
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Dance of the Dead
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+6% synergy
Grave Pact
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Exquisite Blood
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Kaya's Ghostform
7% of 123 decks
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Black Market
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+3% synergy
Sanguine Bond
7% of 123 decks
+2% synergy
Bastion of Remembrance
7% of 123 decks
+1% synergy
The Meathook Massacre
7% of 122 decks
+1% synergy
Revel in Riches
7% of 123 decks
+3% synergy
Dictate of Erebos
6% of 123 decks
+2% synergy
Virtue of Courage
5% of 73 decks
+4% synergy
City on Fire
5% of 96 decks
+0% synergy
Planeswalkers
Ral, Storm Conduit
8% of 36 decks
+5% synergy
Professor Onyx
7% of 123 decks
+6% synergy
Utility Lands
Bojuka Bog
37% of 123 decks
+7% synergy
Phyrexian Tower
37% of 123 decks
+28% synergy
Urborg, Tomb of Yawgmoth
36% of 123 decks
+26% synergy
Ancient Tomb
30% of 123 decks
+19% synergy
Takenuma, Abandoned Mire
25% of 119 decks
+14% synergy
Otawara, Soaring City
25% of 36 decks
+8% synergy
Mystic Sanctuary
22% of 36 decks
+10% synergy
Arena of Glory
19% of 21 decks
+9% synergy
Reliquary Tower
17% of 123 decks
-12% synergy
Spymaster's Vault
16% of 25 decks
+12% synergy
Cabal Coffers
15% of 123 decks
+4% synergy
Command Beacon
14% of 123 decks
+9% synergy
Emergence Zone
13% of 123 decks
+11% synergy
Urza's Saga
12% of 123 decks
+5% synergy
Riptide Laboratory
11% of 36 decks
+9% synergy
High Market
10% of 123 decks
+7% synergy
Geier Reach Sanitarium
7% of 123 decks
+3% synergy
Castle Locthwain
7% of 123 decks
+1% synergy
Rogue's Passage
7% of 123 decks
-13% synergy
Sokenzan, Crucible of Defiance
5% of 119 decks
+0% synergy
Mana Artifacts
Sol Ring
90% of 123 decks
+6% synergy
Arcane Signet
82% of 123 decks
+10% synergy
Talisman of Indulgence
54% of 123 decks
+28% synergy
Talisman of Dominance
53% of 36 decks
+22% synergy
Rakdos Signet
45% of 123 decks
+15% synergy
Izzet Signet
42% of 36 decks
+13% synergy
Talisman of Creativity
42% of 36 decks
+13% synergy
Dimir Signet
39% of 36 decks
+9% synergy
Fellwar Stone
36% of 123 decks
+15% synergy
Mana Crypt
25% of 123 decks
+15% synergy
Lotus Petal
23% of 123 decks
+16% synergy
Jeweled Lotus
20% of 123 decks
+13% synergy
Chrome Mox
19% of 123 decks
+12% synergy
Mana Vault
16% of 123 decks
+10% synergy
Mind Stone
14% of 123 decks
-4% synergy
Thought Vessel
12% of 123 decks
-4% synergy
Mox Diamond
11% of 123 decks
+7% synergy
Cursed Mirror
9% of 123 decks
+4% synergy
Commander's Sphere
9% of 123 decks
-7% synergy
Lion's Eye Diamond
7% of 123 decks
+5% synergy
Mox Amber
7% of 123 decks
+2% synergy
Mox Opal
6% of 123 decks
+1% synergy
Lands
Command Tower
91% of 123 decks
+17% synergy
Sacred Foundry
86% of 7 decks
+49% synergy
Stomping Ground
80% of 5 decks
+39% synergy
Ziatora's Proving Ground
75% of 4 decks
+43% synergy
Steam Vents
72% of 36 decks
+33% synergy
Watery Grave
72% of 36 decks
+31% synergy
Godless Shrine
71% of 7 decks
+30% synergy
Blood Crypt
66% of 123 decks
+27% synergy
Cinder Glade
60% of 5 decks
+22% synergy
Overgrown Tomb
60% of 5 decks
+17% synergy
Plateau
57% of 7 decks
+45% synergy
Scrubland
57% of 7 decks
+44% synergy
Savai Triome
57% of 7 decks
+30% synergy
Luxury Suite
53% of 123 decks
+26% synergy
Morphic Pool
53% of 36 decks
+26% synergy
Training Center
53% of 36 decks
+25% synergy
Dragonskull Summit
50% of 123 decks
+20% synergy
Smoldering Marsh
50% of 123 decks
+18% synergy
Bloodstained Mire
50% of 123 decks
+39% synergy
Sulfurous Springs
50% of 123 decks
+30% synergy
Xander's Lounge
47% of 36 decks
+19% synergy
Crumbling Necropolis
47% of 36 decks
+16% synergy
Exotic Orchard
43% of 123 decks
+8% synergy
Needleverge Pathway
43% of 7 decks
+33% synergy
Brightclimb Pathway
43% of 7 decks
+32% synergy
Battlefield Forge
43% of 7 decks
+18% synergy
Vault of Champions
43% of 7 decks
+17% synergy
Caves of Koilos
43% of 7 decks
+15% synergy
Sulfur Falls
42% of 36 decks
+12% synergy
Drowned Catacomb
39% of 36 decks
+14% synergy
Shivan Reef
39% of 36 decks
+12% synergy
Haunted Ridge
34% of 122 decks
+18% synergy
Blightstep Pathway
33% of 123 decks
+23% synergy
Shipwreck Marsh
33% of 36 decks
+14% synergy
Underground River
33% of 36 decks
+14% synergy
Sunken Hollow
33% of 36 decks
-1% synergy
Polluted Delta
32% of 123 decks
+20% synergy
Arid Mesa
30% of 123 decks
+19% synergy
Scalding Tarn
29% of 123 decks
+18% synergy
Mount Doom
29% of 96 decks
+21% synergy
Marsh Flats
28% of 123 decks
+16% synergy
Badlands
28% of 123 decks
+14% synergy
Graven Cairns
25% of 123 decks
+18% synergy
City of Brass
25% of 123 decks
+17% synergy
Stormcarved Coast
25% of 36 decks
+8% synergy
Verdant Catacombs
24% of 123 decks
+13% synergy
Raucous Theater
24% of 54 decks
+11% synergy
Mana Confluence
23% of 123 decks
+15% synergy
Rakdos Carnarium
21% of 123 decks
+6% synergy
Foreboding Ruins
21% of 123 decks
+5% synergy