Its not hard to have two creatures in your graveyard, and you can even sacrifice one of them with Killmonger
$1.49 Tezzeret, Betrayer of Flesh Kamigawa: Neon Dynasty $0.49 Kaito, Dancing Shadow (340 - Borderless Manga) Phyrexia: All Will Be One Variants $0.99 Jaya, Fiery Negotiator Dominaria United $1.49 Ajani, Caller of the Pride Foundations $0.99 Oko, Lorwyn Liege Lorwyn Eclipsed $1.99 Grist, Voracious Larva Modern Horizons 3 $0.49 Kaya, Orzhov Usurper Ravnica Remastered $1.79 Preordain 2011 Core Set $0.99 Oko, the Ringleader Outlaws of Thunder Junction $0.79 Kaya, Intangible Slayer (341 - Borderless Manga) Phyrexia: All Will Be One Variants $1.99 Saheeli, Filigree Master The Brothers' War $0.99 Ashiok, Wicked Manipulator Wilds of Eldraine 0 results found
The flavor is generic enough that it would fit pretty much in any MTG set (either in-universe or Universes Beyond) that has some chaos-loving baddies, and since mayhem is in no way tied to any Marvel IP (or trademarked by Disney ), Wizards of the Coast should be free to use it whenever and wherever they want
The card advantage, while also filling the grave with Knights you can recur later, is flawless
A 2/3 goblin rogue for three mana, Hobgoblin Bandit Lord provides all other goblins its owner controls with +1/+1, allowing even the most insignificant of goblin tokens to pose a more notable threat