Haku, Guider of Souls

Flash, flying, lifelink
Transmute {1}{u}{b} ({1}{u}{b}, Discard this card:
Search your library for a card with the same
converted mana cost as this card, reveal it, and put it
into your hand. Then shuffle your library. Transmute
only as a sorcery.)
Whenever you discard a card, you may pay {w}{u}. If you do, return Haku, Guider of Souls
to your hand and gain 4 life, then draw a card.
Madness {1}{w}{u}{b}