On discovering this skull the person who holds it gets to add +4 to their AC on their sheet and the AC modifier stays there for a day and after the one day timer the player must roll a wisdom saving throw to keep the skull (16+ to save) . The skull can be passed to another party member but the one day timer stays. If the duration time period is up or the saving throw isn't a success the skull bursts into flames and then melts to ashes.

Notes: The skull has a rune on the side of its skull telling the player what type of stat it boosts they must do a Arcana Check to read it (16+ to succeed), Buff