Kate Stewart, Intruder Alarm, and Jhoira's Timebug

Prerequisites

• Kate Stewart on the battlefield
• Intruder Alarm on the battlefield
• Jhoira's Timebug on the battlefield

Steps

1. Activate Jhoira's Timebug by tapping it, putting a time counter on a permanent you control that already has a time counter on it
2. Kate's first ability triggers, creating a 1/1 Soldier creature token
3. When the Soldier enters, Intruder Alarm triggers, untapping all creatures
4. Repeat

Results

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