Sarutobi, Shinobi Master

Commander ninjutsu {u}{r} ({u}{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.)

Whenever a ninja you control deals combat damage to a player, reveal the top card of your library and put that
card into your hand. Deal damage to any target equal to that cards mana value.

Each creature card in your hand has ninjutsu {1}{u}{r}{g}