Answer:
What has 88 keys, but canβt open a single door?
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
I have three heads. Cut off one I become stronger. Cut off two I become ten.
I am bought by the yard but worn by the foot
What made Cyclops quit teaching?