Emeria Shepherd + Felidar Guardian + Phyrexian Altar
Emeria Shepherd
Felidar Guardian
Phyrexian Altar
Requires
Emeria Shepherd must be on the battlefield.
Felidar Guardian must be in hand.
Phyrexian Altar must be on the battlefield.
Mana needed: 
Steps
- Cast Felidar Guardian by paying .
- Felidar Guardian enters the battlefield, blinking Plains.
- Emeria Shepherd triggers.
- Holding priority, activate Phyrexian Altar by sacrificing Felidar Guardian, adding one mana of any color.
- Resolve the Emeria Shepherd trigger, returning Felidar Guardian from your graveyard to the battlefield.
- Repeat from step 2.
Results
Infinite colored mana. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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Castle Ardenvale
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Lands
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Lush Portico
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Savannah
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Brushland
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Brightclimb Pathway
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Myriad Landscape
31% of 93 decks
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Shadowy Backstreet
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Fortified Village
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Overgrown Farmland
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Orzhov Basilica
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Temple of Silence
27% of 11 decks
+9% synergy
Command Tower
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+3% synergy
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+3% synergy
Demolition Field
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Prismatic Vista
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Cavern of Souls
12% of 93 decks
+5% synergy
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10% of 93 decks
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Urza's Cave
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+5% synergy
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Horizon of Progress
7% of 45 decks
+5% synergy
Reflecting Pool
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