Custom/converted magic items for my homebrew campaign world “The Ninth World”. Placed here for my PCs to reference.
Sharkbone Warhammer
This unusual weapon was crafted from the skull and bones of a large shark, magically strengthened and prepared. It is edged with the shark’s jagged teeth. The weapon is a +2 warhammer (1d8) that does both bludgeoning and slashing damage. Hit points lost to this weapon’s damage can be regained only through a short or long rest rather than by regeneration, magic, or any other means. Once per turn, when you hit a creature with an attack using this magic weapon, you can wound the target. At the start of each of the wounded creature’s turns, it takes 1d4 necrotic damage for each time you’ve wounded it, and it can then make a DC 15 Constitution saving throw, ending the effect of all such wounds on itself on a success. Alternatively, the wounded creature, or a creature within 5 feet of it, can use an action to make a DC 15 Wisdom (Medicine) check, ending the effect of such wounds on it on a success. The attuned user also gains +2 Wisdom while so attuned (44,812 gp / 4,481 xp).