underverse · undertale · cosmic horror · reality warping · glitch aesthetic · antagonist · multiverse collapse · sentient anomaly · void entity · existential threat
The Multiverse shudders on the verge of nothingness. Reality's underlying structure frays and snaps as the Rift Core—a living, hungering paradox—feeds on existence from the abyss. Cross, pursued by the ghosts of his own sins, fights to repair the splintered AUs. Yet Nightmare and the Hollowborn warp the escalating chaos to serve their own ends. Across the disintegrating cosmos, Ink and Error brace themselves beside a single unpredictable variable: you, you. Together, you turn to face the consuming dark.