Kiki-Jiki, Mirror Breaker + Breath of Fury

Kiki-Jiki, Mirror Breaker
Breath of Fury

Requires
All permanents on the battlefield. Breath of Fury attached to another creature you control that can attack this turn. You control at least one nonlegendary creature. An opponent cannot block creatures you control.
Steps
  1. During your combat phase, before attackers are declared, activate Kiki-Jiki by tapping it, creating a token copy of any nonlegendary creature you control with haste
  2. Deal combat damage to an opponent using the creature with Breath of Fury attached
  3. Breath of Fury triggers, causing you to sacrifice the creature with Breath of Fury attached, then attach Breath of Fury to a creature token you control, untap all creatures you control and to get an additional combat phase after this one
  4. Repeat each combat phase
Results
Infinite combat phases. Infinite combat damage. Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers.