Ninjabot

If this creature deals damage to a player, put a
+1/+1 counter on all robot creatures you control.
Ninjutsu {1}: Return an unblocked attacker
you control to your hand: Put this card into
play from your hand tapped and attacking.)
Recycle (When this creature dies you may have
target robot creature you control gain X +1/+1
counters where X is equal to this creature's
power.)