Kiki-Jiki, Mirror Breaker + Port Razer

Kiki-Jiki, Mirror Breaker
Port Razer

Requires
All permanents on the battlefield. An opponent is unable to block Port Razer.
Steps
  1. Activate Kiki-Jiki by tapping it, creating a token copy of Port Razer with haste
  2. Declare the Port Razer token as an attacker
  3. When the Port Razer token deals combat damage, it triggers, causing you to untap all creatures you control and get another combat phase after this one
  4. Repeat
Results
Infinite damage. Infinite creature tokens with haste. Infinite combat phases. Infinite combat damage. Infinite ETB. Infinite LTB. Infinite untap of creatures you control. Infinite death triggers. Infinite sacrifice triggers.