Mosshide Troll Belt

Constitution: +1 (up to a maximum of 20)
While in combat, you regain 1d4 hit points at
the start of your turn if you have less than half
your hit points left. This property ceases to
function for 1 hour if you take acid or fire
damage, or until the next dawn if you drop to
0 hit points.
Requires Attunement.