Gambit's Hammer

+1 Warhammer, Versatile:
1 D8/D10 Bludgeoning + X Force
Before you roll to hit you may choose a number
up to your current hit points to add as damage to
you attack.On a hit deal that much damage plus
normal weapon damage to your target. On a miss
the weapon deals that damage to you instead.
The god of luck granted gambit this hammer
after he defeated a powerful vampire lord. It
contains the Vampires immortal soul and has the
ability to redistribute life at a potential cost.