1. The ability to detach limbs and use them as a weapon.
It’s real! Found as a super power of the hilariously literal hero Arm-Fall-Off Boy. As you can imagine, you can really only use one limb at a time. Also worth noting some humans have this superpower.
6. The power to eat and digest anything without suffering any physical harm.
Yes, Matter-Eater Lad uses his ability to eat and digest his way through tables, walls, and pretty much anything that gets in his way without harming himself. Fans of greasy fast food might argue this power is not entirely useless.
7. The power to eat and digest anything with your external digestive system, in the form of two slugs (that don’t even have rockets or anything).
OK, now this really takes the fun out of being able to eat anything. Maggott does gain some super power from his digestion slugs, but they need to reenter his body before he can absorb the energy, making it pretty useless in a fire fight.