Breath of Fury + Leonin Warleader + Urabrask the Hidden

Breath of Fury
Leonin Warleader
Urabrask the Hidden

Requires
Breath of Fury must be on the battlefield. Leonin Warleader must be on the battlefield. Urabrask the Hidden must be on the battlefield. Breath of Fury attached to any other creature you control. An opponent cannot block creatures you control.
Steps
  1. Declare Leonin Warleader and the creature with Breath of Fury attached as attackers.
  2. Leonin Warleader triggers, creating two 1/1 Cat creature tokens.
  3. Deal combat damage using the creature that has Breath of Fury attached.
  4. Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to a Cat token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
  5. Repeat each combat phase.
Results
Infinite combat damage. Infinite combat phases. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mana creatures you control can produce. Infinite sacrifice triggers. Infinite untap of creatures you control. Infinite creature tokens with haste.

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