Frieren, the Slayer

Flying, Shroud

Magecraft — Whenever you cast or copy an Instant
or Sorcery spell, Frieren, the Slayer gets +1/+0 until
end of turn, and exile the top card of your deck. If
it's an Instant or Sorcery, you may cast it this turn.

Zoltraak — {7}{b}{r}: This ability costs {x} less to activate, where X is Frieren, the Slayer's Power. Frieren, the Slayer deals damage equal to her power
to any target.