Treacherous Allure

Treacherous Allure
Feat
Prerequisite: Level 4

You gain the following benefits.
Enchanting Presence.
You always have the Charm Person spell prepared. You can cast it without a spell slot, and you must finish a Long Rest before you can cast it in this way again. You can also cast it using spell slots you have of the appropriate level. Your spellcasting ability for the spell is the ability increased by this feat.
Inevitable Betrayal.
You have Advantage on attack rolls against creatures with the Charmed condition.

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