If Scyther has any Energy attached to it, Scyther's Retreat Cost is 0.

Flip 3 coins. If 1 of them is heads, this attack does 10 damage plus 10 more damage. If 2 of them are heads, this attack does 10 damage plus 20 more damage. If all of them are heads, this attack does 10 damage plus 40 more damage.