.. Being invisible

You should make yourself invisible.

The answer lies in the three mysterious runes.

Did you pick up the stuff ( The empty jar and the trowel) in the cave of potions?

Then you must have got the list of ingredients for the mask. Here it is:

• A Ram's skull
• Two Nattamare Parasites
• Hair of Bearded Kroke

Get them into the cave of potions and put them into the cauldron.