Felidar Guardian + Altar of the Brood + Phyrexian Metamorph

Prerequisites

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Steps

1. 1Cast Phyrexian Metamorph by paying .
2. 2Phyrexian Metamorph enters the battlefield as a copy of Felidar Guardian, triggering Altar of the Brood and itself.
3. 3Resolve the Altar of the Brood trigger, causing each opponent to mill a card.
4. 4Resolve the Phyrexian Metamorph's trigger, blinking Felidar Guardian.
5. 5Felidar Guardian enters the battlefield, triggering Altar of the Brood and itself.
6. 6Resolve the Altar of the Brood trigger, causing each opponent to mill a card.
7. 7Resolve the Felidar Guardian's trigger, blinking Phyrexian Metamorph.
8. 8Repeat from step 2.

Effects

• Infinite ETB
• Infinite LTB
• Infinite mill