Set Your Heart Ablaze

Play this card only during combat and only if a creature died this turn.
Untap all creatures you control and put a breath counter on them. They gain haste until end of turn. After this phase there is an additional combat phase.

"No matter how devastated you may be by your
own weakness or uselessness… set your heart ablaze. Grit your teeth and look straight ahead.”
-Kyojuro Rengoku