TF2 Sniper

Reach, First Strike
{1}, {t}: Place a Charge counter on this card
{t}: Remove all Charge counters from this card. Deal X damage to target Creature, Opponent, or Planeswalker, where X is equal to the number of Charge counters removed by this ability.
When this Creature Attacks or Blocks, remove all Charge counters from this card, then increase this Creature's Power by the number of Charge counters removed until the End Step.