Hookfang, the Flame Dragon

Reach
When this creature enters the battlefield, put
3 flame counters on him. A flame counter gives
this creature +2/+1.
{0}: Remove a flame counter and then deal 2
damage to any target. If that target is a player or
planeswalker, it deals 1 damage instead. Activate
only once each turn.
I believe in learning on the job.