Magnetite Horn

Fashioned from the harvested horn of a magnetite dragon, this charm can be socketed on a ferrous weapon or on a worn item that contains iron, conferring different benefits to each.

Ferrous Weapon: While you hold the socketed weapon, when you are hit by a weapon attack made with a ferrous weapon or ammunition that you can see, you can use your reaction to activate the magnetic properties of the horn. When you do so, the attack's weapon or ammunition is pulled towards your own, giving you a +1 bonus to your AC against the attack as you attempt to parry it and possibly turning the hit into a miss.

Ferrous Worn Item: While you wear the socketed item, when a creature within 5 feet of you is targeted by a weapon attack made with a ferrous weapon or ammunition, you can use your reaction to activate the magnetic properties of the horn. When you do so, roll a d20. On an 11 or higher, you become the target of the attack instead.