Purphoros, Bronze-Blooded, Firestorm Phoenix, Phyrexian Altar, and Biomancer's Familiar

Prerequisites

• Purphoros, Bronze-Blooded on the battlefield
• Firestorm Phoenix in hand
• Phyrexian Altar on the battlefield
• Biomancer's Familiar on the battlefield
• available

Steps

1. Activate Purphoros by paying , putting Firestorm Phoenix onto the battlefield from your hand
2. Activate Phyrexian Altar by sacrificing Firestorm Phoenix, adding
3. Firestorm Phoenix is returned to your hand instead of being put into your graveyard
4. Repeat

Results

• Infinite ETB
• Infinite LTB