Wandering Vagrant

Flying
Electric Surge — Whenever you cast an instant or sorcery spell, you may pay {r}{r}. If you do,
Wandering Vagrant deals 2 damage to any target.
Fickle (When this creature enters the battlefield, flip a
coin. If heads, put a +1/+1 counter on this creature it
gains Haste until end of turn. If tails, it gains
prowess [Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.])