Mind’s Eye Incarnate

If you cast this card from your hand, it has power and toughness equal to the number of cards in your library. Otherwise, it has power and toughness equal to the number of cards in your hand.

Flying, vigilance, shroud

Whenever you cast or copy a spell, draw a card.

If Mind’s Eye Incarnate would be exiled or put into a graveyard from anywhere, shuffle it and it’s owner’s graveyard into their library instead.