Intruder Alarm, and Imperious Perfect

Prerequisites

• Intruder Alarm on the battlefield
• Imperious Perfect on the battlefield
• Imperious Perfect does not have summoning sickness
• from creature sources available

Steps

1. Pay and tap Imperious Perfect to create a 1/1 Elf
2. The Elf enters untapping all creatures you control
3. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite untap