Kiki-Jiki, Mirror Breaker, Changeling Berserker, and Scourge of Valkas

Prerequisites

• Kiki-Jiki, Mirror Breaker on the battlefield
• Changeling Berserker on the battlefield
• Scourge of Valkas on the battlefield

Steps

1. Activate Kiki-Jiki by tapping it, making a token copy of Changeling Berserker
2. The token Changeling Berserker and Scourge of Valkas trigger
3. Resolve the Changeling Berserker trigger, exiling Kiki-Jiki
4. Resolve the Scourge of Valkas trigger, dealing 3 damage to Changeling Berserker, killing it
5. The token Changeling Berserker triggers, returning Kiki-Jiki to the battlefield
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB