Marvuel, Skaaberen's Bane

Partner with Traven, Rebel Stitcher. (When this creature enters the battlefield, target player may put Traven into their hand from their library, then shuffle.)
Flying, lifelink
When Marvuel, Skaaberen's Bane enters the battlefield or attacks, you may shuffle target player's graveyard into their library. You gain 1 life for each card shuffled this way.