Note the date and time, as this is a historical moment. For once I actually agree with something said by Profanity.
You will fear me.
You will be afraid of me.
The meaning is the same, and either is correct alone. Mikael seems to have attempted to use both at once, and it doesn't work that way.
The only way you can say "fear of" is when you say something like "I have a fear of heights." But fear is then being used as a noun, not a verb.