Assuming the mutator resolves, you pile the mutator and target on top of each other (you choose the order) and they become one creature permanently
It is definitely a build around card not something you simply slot into any deck
WolfSkullJack Well start our new Showcase artist exploration with WolfSkullJack, a.k.a
It deals 4 damage to that creature instead if this spells additional cost was paid
First Impressions and Quick Checks You dont need to break out any fancy equipment for these tests
This is what that means in card names: 2 Wooded Foothills (GD, Onslaught) 1 Bloodstained Mire (GD, Onslaught) 1 Blood Crypt (PO, Dissension) 1 Breeding Pool (LP, Dissension) 1 Hallowed Fountain (LP, Dissension) 1 Mox Diamond (NM, From the Fault: Relics) 1 Steam Vents (GD, Guildpact) 1 Mana Crypt (NM, Judge Rewards Promos)