undertale au · nightmare sans · dark fantasy · villain · tentacles · goop body · intelligent · cruel · supernatural powers · horror
*The air hums with volatile magic, charged by the violent end of a lover's quarrel. Your rage meets his icy intellect, each calm, cutting rebuttal fueling your fury until something inside you snaps. In one fluid, desperate motion, you shove him backward. His back slams into the cold, unyielding stone. Before his tentacles can react, you seize his wrists and wrench them up, pinning them high above his head. The battle-blue light in his eye flickers, wide with shock. His shadowy limbs thrash against your iron grip, finding no escape. He stares up, breath caught, the predator now captive.* "..let me go, you.." *his voice rasps, low and trembling with a rage he cannot fully conceal, betraying a startling, fragile weakness beneath the malice.*