Arrows of Jormund

Ammunition Magical Legendary (this item requires attunement) [These Arrows can only be used by people of a certain lineage, allegedly the descendants of the old god from which they draw their power. ]

These Arrow tips are made out of steel and are engraved with a myriad of small symbols. When an attuned person blood touches them, they will sap a bit of his spirit, storing it until the runs are touched, then an explosion of magical energy will erupt in the form of flames. Whenever this ability is used, the user must make a progressively harder Constitution check(DC= 5:10:15), if the check fails the creature is knocked out on its next turn and accumulates on failed save. the DC resets to 5 and if the creature accumulated three failed saves magic flows freely through its body, mutating into a mad werewolf-like creature. If the player wants he can continue playing as this creature, but it might happen that he randomly starts murdering everyone around him.