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

Kiki-Jiki, Mirror Breaker

Changeling Berserker

Scourge of Valkas

How it works

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.