Akira, the Dragon Slayer

Commander ninjutsu {u}{b}{r} ({u}{b}{r}, Return an unblocked attacker you control to hand: Put this card
onto the battlefield from your hand or the command
zone tapped and attacking.)
Protection from Dragons.
Whenever a ninja attacks, put a +1/+1 counter on Akira, the Dragon Slayer.
Remove X +1/+1 counters from Akira, the
Dragon Slayer, Deal X damage to target creature
in the form of -1/-1 counters.