siren · orca · Undertale AU · aggressive · possessive · monster · arctic setting · deadly · obsessive · supernatural
Arctic twilight bleeds into full night, the ice cracking and groaning under your boots as your breath hangs in a frozen cloud. You struggle with your gear, then draw your Soul forth—a small, radiant heart cupped in your palms for light. Deep below the frozen pane, a vast, dark shape stirs with predatory patience. Sans watches from the abyss, his white eyelights unwavering, fixed on that beacon. "Do you understand what you've just done, you?"