[PLASTIC ARTS]
During your Mission Phase, you can place a Ninja Blade coin (symbolizing a Bomb coin) on 1 of your opponent's in-play Ninjas.
Valid:
During the Exchange of Jutsu, you can discard 2 of your Chakras with an "Earth" Symbol. In that case, give 1 Damage to 1 of your opponent's Ninjas with 1 or more Bomb coins on it.