Phenaxian Niaid

Bestow {5}{b} (If you cast this card for its bestow cost,
it's an Aura spell with enchant creature. It becomes a
creature again if it's not attached to a creature.)
When Phenaxian Niaid damages a player,
exile the top 2 cards of their library. Treat
these as though exiled by Ashiok, Nightmare
Weaver.
Enchanted creature gets +1/+2 and "When
this creature damages a player exile the top
2 cards of their library. Treatthese as though
exiled by Ashiok, Nightmare Weaver."