Zuko, Prince of Flames

Mountainwalk, Doublestrike
When Zuko, Prince of Flames enters the battlefield, create 3 red 2/2 Fire Nation Soldier
token creatures
{t}{x} Target player or Planeswalker takes X
damage, where X is the casting cost of this ability
"Instead of lightning, it just blew up in my face, just
like everything always does."