Ukkima, Stalking Shadow

Mana cost: {1}{U}{B}

Legendary Creature — Whale Wolf

Partner with Cazur, Ruthless Stalker (When this creature enters, target player may put Cazur into their hand from their library, then shuffle.) Ukkima can't be blocked. When Ukkima leaves the battlefield, it deals X damage to target player and you gain X life, where X is its power.