Arlamis, Defiant Exile

Haste
Whenever a creature you don't own is dealt damage by Arlamis, Defiant Exile, exile the top card of your library.
You may cast cards exiled with Arlamis anytime.
{r}{r}, {t}: Arlamis, Defiant Exile deals damage to any target equal to the number of cards exiled with Arlamis.