Metamorphosis Fanatic
Umbral Collar Zealot
Felidar Guardian

   Prerequisites

What do I need to start this combo?
Felidar Guardian in hand.
Metamorphosis Fanatic and Umbral Collar Zealot on the battlefield.
You have enough mana to cast Felidar Guardian.

   Steps

How does this combo work?
1
Cast Felidar Guardian by paying its mana cost.
2
When Felidar Guardian enters the battlefield, it triggers, targeting Metamorphosis Fanatic.
3
Holding priority, activate Umbral Collar Zealot by sacrificing Felidar Guardian.
4
Resolve the Felidar Guardian ability, blinking Metamorphosis Fanatic.
5
When Metamorphosis Fanatic enters the battlefield, it triggers, returning Felidar Guardian from your graveyard to the battlefield.
6
Repeat from step 2.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite surveil
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