How do I defeat the eyeball?

Hint 1 of 6:

It can see you.

Hint 2 of 6:

Do you have something to block its vision?

Hint 3 of 6:

Talk to the Shak again.

Hint 4 of 6:

What did the Shak call you?

Hint 5 of 6:

MUDman!