This sinister loop relies on transforming Norman Osborn // Green Goblin to unlock his Goblin Formula static ability, which grants every nonland card in your graveyard mayhem so you can recast them from the graveyard for their mana cost with a steep {2} discount. By feeding Acererak the Archlich into Skirge Familiar's discard ability, you generate the black mana needed to cast Acererak right back out of the graveyard for just a single black mana. Each time Acererak re-enters the battlefield, his triggered ability forces him back to your hand while you endlessly venture into dungeons, creating an unceasing engine that fuels infinite loops and overwhelming value.