Clerical Work: Specialty Priests of Tymora for D&D 5th Edition

I'm importing the idea of Specialty Priests and channeling a bit of DnD 4E by treating them as Feats.

Specialty Priests of Tymora

Luckbringer Feat

Prerequisite: Cleric with Trickery Divine Domain

• Whenever you make an ability check with a Gaming set, you are considered proficient with the Gaming set and add double your proficiency bonus to the check, instead of your normal proficiency bonus.

• Once a day, you may automatically succeed on one saving throw that would avert an unfortunate or damaging effect.  You must declare the use of this ability rather than roll the saving throw.