Ninja Tool, Shuriken

{t} Flip a Ninja Creature over it deals X damage to target creature, where X is your creatures power.
{x},{t} Flip X Ninjas you controls ,where X is the mana tapped, they gain unblockable until the end of your turn, at the end step they flip back over and have hexproof until its your next turn.
Thrown into the battle and its so small amount of damage that sneaks up on you.