Rionya, Fire Dancer + Port Razer

Rionya, Fire Dancer
Port Razer

Requires
All permanents on the battlefield. An opponent is unable to block and kill Port Razer.
Steps
  1. At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Port Razer with haste
  2. Declare a 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 to get an additional 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.