Ahri, The Nine-Tailed Fox

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever Ahri deals combat damage to a player you may pay {1}{w/u} to exile target nonland permanent you control, then return it to the battlefield under your control.

"Mortal lives are so fleeting." - Ahri