Felidar Guardian + Phyrexian Metamorph

WU identity

Commander legal

The 2 combo pieces

• Felidar Guardian
• Phyrexian Metamorph

How to execute it

1. Cast Phyrexian Metamorph by paying its mana cost, choosing to have it enter the battlefield as a copy of Felidar Guardian
2. When Phyrexian Metamorph enters the battlefield, it triggers, blinking Felidar Guardian.
3. When Felidar Guardian enters the battlefield, it triggers, blinking Phyrexian Metamorph. Choose to have Phyrexian Metamorph enter the battlefield as a copy of Felidar Guardian.
4. Repeat from step 2.

What the combo produces

• Infinite creature LTB
• Infinite ETB