Sleepwalker/YMMV

• Complete Monster: Cobweb is a demon that invades the minds of humans and drives them insane with his lies, all while plotting to invade and enslave the Earth, framing Sleepwalker in the process, to the point where his victims take comfort in his slowly destroying them. Psyko cut out the hearts of between fourteen and eighteen women with a kitchen knife before he became fused with a demonic entity and turned into an Ax Crazy monster.
• Nightmare Fuel: Sleepwalker suffers a series of mind-bending hallucinations when he becomes exposed to a certain frequency of light.
  • The more terrifying part is when warp beams are used on living things. It's no wonder he's under the oath not to do just that.