Amulet of Vampiric Regeneration (hb)(cos)

While wearing the amulet, you regain 10 hit points at the start of your turn if you have at least 1 hit point remaining and aren’t in running water or sunlight. If you take radiant damage or damage from holy water, this feature doesn’t function at the start of your next turn.

While wearing the amulet, you have the following weaknesses: 

• Forbiddance. You can’t enter a residence without an invitation from one of the occupants.
• Harmed by Running Water. You take 20 acid damage if you ends your turn in running water. 
• Sunlight Hypersensitivity. While in sunlight, you take 20 radiant damage at the start of your turn, and you have disadvantage on attack rolls and ability checks