Steelshell Kappa

Ninjutsu {1}{g}{g}
Whenever Steelshell Kappa deals combat
damage to a player, you may put a Ninja card
from your hand onto the battlefield.
{g}: Steelshell Kappa gains indestructible and
hexproof until end of turn and doesn't untap
during your next untap step. Prevent all damage
that would be dealt by it this turn.