Fulgore MK III

Whenever Fulgore enters the battlefield or
attacks, you get a {e} (an energy counter).
Pay 2 {e}: Fulgore deals 3 damage to target
creature or planeswalker.
Pay 4 {e}: Fulgore deals 5 damage to any target.
{t}, Pay 10 {e}: Fulgore deals 30 damage to target opponent. Activate this ability only during your
turn and only once each turn.