Ranni, the Snow Witch

Vigilance
Instant and Sorcery spells you cast cost {1} less to
cast.
When you cast a white spell, you gain 2 life.
When you cast a blue spell, scry 2
When you cast a black spell, create a 1/1 black
assassin token with menace.
Exile seven instant and/or sorceries from your graveyard, then deal damage equal to their
combined mana value to any target.