Spellbound Flameheart

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
First strike
Whenever Spellbound Flameheart deals combat
damage to a player, the next instant or sorcery
spell you cast this turn costs {u} or {r} less to cast
for each 1 damage dealt to them. This effect
reduces only the amount of colored mana you
pay.