Shallan Davar, Three-Faced

At the beginning of your upkeep, exile the top
two cards of your library. You may play them
this turn. Whenever you play a card exiled this
way, put a sanity counter on Shallan Davar,
Three-Faced. If she has five or more sanity
counters on her, remove all sanity counters
from her and transform her.
"I have this uncanny ability to hide away anything
I don't want to think about. It . . . it's getting
harder, but for most things, I can just . . . There.
Gone."