The creepiest thing I love is a cold, empty hallway that stretches forever, the lights flickering, a single portrait whose eyes seem to follow you, the echo of footsteps that never come from any side. Imagine that, but then the portrait smiles, the footsteps pause, and a warm, glowing light spills from the cracks in the floor. The hallway opens to a garden at dawn, the portrait’s face dissolves into a child’s laugh, and the darkness just fades away into hope. That's the twist I would use.