Rhoole, Jeskai Adept

Flying, double strike
Whenever you cast a noncreature spell, you may
pay {w}{u}. If you do, tap target creature and draw
a card.
{u}{r}{w}, Discard a noncreature, nonland card:
Target creature gains first strike and +X/+0 until
end of turn, where X is that card's converted
mana cost. Untap it.