Soul Eater
[Void Expansion:...] Darkness gushed out of Arad as Shi's claw drew closer to his body.
[...Accursed Pillar] The massive black pillar of cursed metal appeared behind his back. Countless vampire spawns emerged from nothing, lined around the pillar, the blood dancing beneath their feet.
Unlike Gojo's expansion which twists the void, Arad's expansion simply opens his stomach to the outer world. Anything that was inside him could be used there, including the cursed metal.
His range usually extends up to four kilometers as he's a young void dragon, but since using it all would suck the barbarians and the girls inside, he decreased it to a reserved two-kilometer.
To make sure the hell he's about to unleash won't leak out, Arad relied on Doma's assistance to enclose his expansion in several barriers, protecting everyone outside and preventing them from entering.