Heim Goblindropper said...
The last ingredient that we need will be the hardest to get. To complete this goal, you'll need to get help. There is no way you'll be able to do this on your own. You see, the third and final ingredient that the spell requires is the spirit of a lost warrior.
Keep this Medallion with you and when you defeat the spirit, it will be imprisoned within the locket. Once you have the spirit, bring me the locket, and we will seal the chest.