
Prerequisite: Sorcerer Class Charisma 16
You learn one spell, and cast this spell using spell slots you have. This spell doesn't count against your known spells and is always prepared. You may use this feat multiple times equal to your proficiency modifier (DM Restriction).
(Talk with your DM this feat is meant to be an added spell gained outside of an ability score improvement)

Thanks for that. I was trying to do the same in homebrew and failing miserably. Often wish I could base my own feats on other people's homebrew just so I could reverse engineer and learn how they do it.
Your welcome, unfortunately dnd beyond has since gutted the (Hidden Feature) of Gift of the Metallic Dragon Feat, so it cant be used this way.... but i got to it in time and these homebrew still work (for now).