Arcanine 6

Flip a coin. If heads, this attack does 10 damage plus 20 more damage; if tails, this attack does 10 damage. Damage: 10+

Discard 2 Fire Energy cards attached to Arcanine in order to use this attack. This attack does 40 damage plus 10 more damage for each damage counter on Arcanine. Damage: 40+