Aspect of the Nightingale

This is a conversion of the Aspect of the Nightingale spell from Pathfinder 1e

You take on an aspect of a nightingale. Your voice becomes clear and pleasant. You gain advantage on Charisma (Performance) checks made while singing, Charisma (Persuasion) checks, and saving throws against charm effects.

A cleric who worships Shelyn can replace one of their 1st level Domain spells with this spell. The decision to substitute a Domain spell must be made upon gaining a new level of cleric, but you can change your decisions on the matter when you level up again.