30 Day 5 Minute Challenge: Day 6 fantasy2supers

I really liked Semiurge's idea of converting fantasy concepts to superheroes (or superhero concepts to fantasy). I think, as with the last 5 minute challenge, this is a concept that with a bit more research and work could be much better, especially since I forget a lot of the particulars of the more "iconic" D&D monsters off-hand, but hopefully in 5 minutes I can at least drop a few interesting ideas.

• The Beholder: A corpulent villain with eyes all around his head. His eyes emit powerful incinerating beams. Although powerful, he lacks vision (pun intended), and often serves as a henchman in other supervillain's lairs, playing best to his strengths. He is usually head of security.
• Displacer Beast: During one of Magik's stays in Limbo, she encountered an unusual demonic beast. A powerful, panther-like creature with whip-like tentacles on its front shoulders and the ability to teleport like herself. The Displacer Beast is now her loyal friend.
• Mindflayer: A practitioner of the dark arts, a Sorcerer Supreme wannabe, bit off more than they could chew and summoned an eldritch entity from another dimension. The being infected them like a fungus, warping them into a cephalopodic form. The summoning was successful, and the Mindflayer is now truly more powerful than the Sorcerer Supreme herself, but with that great power comes great madness.
• Slime (Gelatinous Cube): A mutant with the ability to expand to the point of filling up the dimensions of a small to medium-sized space. In this form they are gelatinous, absorbing whatever they touch.

These are more-or-less straight adaptations of the respective monsters, but I think it's a decent start. With a bit more character and costume design, and some work on personality, motivations, and histories, these could be interesting characters.