Spell scroll
Spell scroll typically refers to a treasure that can be found on the adventure map. Although it is not technically an artifact, it works in a very similar way. It appears appears in the backpack after hero picks it up, and it can be equipped in the miscallaneous artifact slot. The scroll contains one spell, and as long as the scroll is equipped, that spell is added to the hero's spell book. However, unlike artifacts, scrolls can not be be sacrificed at an Altar of Sacrifice for experience.