And where's the last?

Hint 1 of 5:

I'm sure that even adventure game characters have to eat once.

Hint 2 of 5:

Go to the restaurant to see what they have to eat.

Hint 3 of 5:

Buy the bisque and eat it.  You'll find a conch shell inside.

Hint 4 of 5:

Do you have a spell that will take care of shells?

Hint 5 of 5:

Of course you do.  Mutate one you've probably been using quite often.