Vax, Chosen of the Raven Queen

Haste, Deathtouch
{t}, Until end of turn, whenever a creature an opponent
controls is dealt damage, destroy it.
{b}{b}{b}, Vex, Chosen of the Raven Queen deals three
damage split between up to three targets.
{u}{u}{u}, Target opponent exiles the top five cards of
their library. Until end of turn, you may play those
cards and you may cast mana as though it were mana of
any kind to cast them.
"Dagger, dagger, dagger."