Is there anything to do in the volcano room?

Hint 1 of 5:

Not in the original 350-point version of Adventure.

Hint 2 of 5:

Here, yes.

Hint 3 of 5:

Make a bridge. You know the routine.

Hint 4 of 5:

You need something to protect you from the fumes. How about a mithril ring?

Hint 5 of 5:

You can turn the sword into a ring. Use a magic word.