Attach to Galadriel.

Action: Exhaust Mirror of Galadriel to search the top 10 cards of your deck for a card and add it to your hand. Shuffle the rest back into your deck. Then, discard a random card from your hand.

"What you will see, if you leave the Mirror free to work, I cannot tell. For it shows things that were, things that are, things that yet may be."
–Galadriel, The Fellowship of the Ring