Life-Steal Dagger (5e Equipment)
From D&D Wiki
Weapon (dagger), uncommon (requires attunement)
This magic dagger is imbued with life-stealing energy.
This item has 3 charges. Once per turn, when you hit and damage a creature with this dagger, you can expend one charge to deal an extra 2d4 necrotic damage to the target, and regain hit points equal to the amount lost due to this necrotic damage.
The life-steal dagger regains 1d3 charges daily at dawn.