Love Bites

Love Bites
Feat
Prerequisite: Level 4

You gain the following benefits.
Endearing Pain.
Immediately after you damage a creature with a Melee weapon or an Unarmed Strike, you can take a Bonus Action to give the target the Charmed condition until the start of your next turn or until you or your allies damage it. Once you use this benefit, you can't use it again until you finish a Short or Long Rest.

Source: Astarion's Book of Hungers (ABH), page 10