Patron's Hand Curse

"Come on, boy! Won’t you shake... a poor sinner's hand?"
- Doctor Facilier

Whether it was for your personal goils or your patron’s own amusement, your patron has placed one of your hands under a horrible curse.
Once per day, the next time you perform a handshake with a creature using your cursed hand, the target must make a DC 17 Dexterity Save. On a failure, the target takes 2d10 psychic damage and is charmed by your character for 15 minutes (enthralled at level 14+). If the target succeeds, they immediately pull their hand away and only take half as much damage.

If you do not attempt shake the hands of any creature within the day, you must make a DC 17 Wisdom Save. On a failure, you take 2d10 psychic damage and are overtaken by madness for one minute. On a success, you only take half as much damage.