Clerical Work: Specialty Priests of Umberlee 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 Umberlee

Waveservants Feat
Prerequisite: Cleric with Tempest Divine Domain

• You may breathe underwater.

• Undead that were killed at sea or are aquatic in nature have disadvantage on their saving throws against your Turn Undead.