Lórien, Master of Desire

Indestructible
As long as your devotion to blue and black is less than seven, Lorien isn't a creature.
Tap two untapped creatures you control: Draw two cards, then discard a card.
{2}{u}{b}, Discard a card: Search your library for a card with the same converted mana cost as the discarded card, reveal it, and put it into your hand. Then shuffle your library.