It's been a great week, I love this song, and it's Saturday night!
This mythic artifact grants it's bearer great power. It is imbued with the power of the first fallen angel, the true and original lord of Hell. While wearing the key, the owner gains 20 extra hit points (which replenish every morning at dawn). In addition, they gain -2 [+2] bonus to AC and a +2 to hit and damage with all attacks (including spells). Finally they get a number of attacks each round equal their level +1 against foes of 1 HD or less (if the wearer is a fighter this stacks with that ability). NPC’s use their HD instead of level. The artifact is priceless and sought after by many powerful individuals.