Sorry if this is a stupid question, but this will be my first time using roll20. Due to my backstory, my GM rewarded me a amulet that contains the spell "Arcane Armor", usable once per long rest. Now, the sheet is a little confusing, should I just add arcane armor in my Spells tab? Or should I add a item and somehow set the spell within it? We're using 5e btw.