Charmander, Loyal Invoker

Evolution - This creature enters the battlefield with an experience counter on it. When this creature destroys another creature by combat, put an experience counter on this creature. Remove three experience counters from this creature; search your library for a card named Charmeleon and Evolve it on top of this creature.

Roaring Resolve - When this creature attacks, you may pay {r}. If you do, this creature gets +1/+0 until the end of the turn and deals 1 damage to target creature.