Prowling Geistcatcher + Felidar Guardian + Phyrexian Altar
Prowling Geistcatcher
Felidar Guardian
Phyrexian Altar
Requires
Prowling Geistcatcher 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, triggering its ability, targeting Prowling Geistcatcher.
- Holding priority, activate Phyrexian Altar by sacrificing Felidar Guardian, adding one mana of any color.
- Prowling Geistcatcher triggers, exiling Felidar Guardian from your graveyard.
- Resolve the Felidar Guardian trigger from 2, blinking Prowling Geistcatcher.
- Prowling Geistcatcher leaves the battlefield, returning Felidar Guardian from exile to the battlefield.
- Repeat from step 2.
Results
Infinite blinking. Infinite colored mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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