Burning of a Kingdom's Heart

Spree (Choose one or more additional costs.)

+ {2}{r}— Untap all creatures you control. If it's
your combat phase, there is an additional combat phase after this phase.
+ {2}— Creatures you control get +1/+0 and gain first strike until end of turn.
+ {r} — Choose target opponent. Whenever a creature you control deals combat damage to that player this turn, create a tapped Treasure token.