Krilia, the Eternal

Flying, Vigilance, Deathtouch, Lifelink
Pay 1 life: Discard your hand Draw a new hand.
Pay 3 life: Add {w}{u}{b}{g} to your mama pool.
{w}{u}{b}{g}: Search your library for a card called Krilia, the Eternal and put it onto the battlefield. Shuffle your library.
Pay X life: Draw X cards.