Dronin, Blood Primodial

Shadow (This creature can not be blocked by creatures without shadow.)
Presence (This creature can only be targeted by abilities of cards with the Legendary supertype.)
Flying, haste, trample
Whenever a spell is cast, you may have Dronin, Blood Primodial deal {x} damage to target player.
Reborn {1} (If this creature were to leave the battlefield, phase out, or countered, you may pay {1} to have it enter the battlefield, phase in, or counter target spell. Exile target permanent.)