Firestorm Phoenix + Phyrexian Altar + Elvish Piper + Intruder Alarm

Prerequisites

• Elvish Piper does not have summoning sickness.

Steps

1. 1Activate Elvish Piper by paying and tapping it, putting Firestorm Phoenix onto the battlefield from your hand.
2. 2When Firestorm Phoenix enters the battlefield, Intruder Alarm triggers, untapping all creatures.
3. 3Activate Phyrexian Altar by sacrificing Firestorm Phoenix, adding .
4. 4Firestorm Phoenix is returned to your hand instead of being put into your graveyard.
5. 5Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite mana creatures you control can produce
• Infinite untap of creatures