Vesper, Child of the Arts

Whenever Vesper, Child of the Arts, becomes the target of a spell or ability, you may pay {2}. If you do, you may counter that spell or ability, and if it's a spell, exile it, and you can cast that spell by paying {3}

{r/g}{1}: Vesper, Child of the Arts, gains the ability of any other creature on the battlefield until end of turn.

{g/u}{1}: Vesper may sacrifice an artifact or enchantment to gain another creature's ability until end of turn.

"I will learn to be anyone I need to be."