Assaya the Last Disciple

Whenever you look at the top cards of your
library, you may exile any number of those cards
face down. You may look at those cards as long
as they are exiled and play them at any time.
{3}{u}, {t}: Scry 1
"Knowledge left to its own devices will simply erode
into fruitless dust. That's why I always keep
everything I find in mint condition!"