Helm of Tyranny for D&D 5E

Helm of Tyranny

Bards dazzle audiences at inns and taverns throughout the continent with stories from the time that Strongheart the Paladin and Warduke were like brothers; stalwart and faithful companions who warred against the forces of darkness...until the day that Warduke stumbled upon the Helm of Tyranny

Whenever you place the Helm upon your head, you must make a Wisdom save vs DC 14.  On a failure, your alignment immediately shifts to Evil.  

Once the Helm has bonded, you gain a +2 bonus to AC, all saving throws and to intimidation and survival skills.  You also gain dark vision out to 120 feet.  Finally, the Helm grants resistance to necrotic and radiant damage.