Tiefling Heritage: Deomodand-Spawn for D&D 5th Edition

My conversion of Pathfinder's Blood of Fiends to DnD 5th Edition continues:

Demodand-Spawn Tiefling

(Unless otherwise noted, all traits are per the 5th Ed. Player's Handbook)

Ability Score Increase. Your Constitution score increases by 2, and your Wisdom score increases by 1.

Ungodly Resistance. You have resistance to radiant damage.

Ungodly Legacy. You know the thaumaturgy cantrip.  Once you reach 3rd level, you can cast the armor of agathys spell once per day as a 2nd-level spell.  Once you reach 5th level, you can also cast the crown of madness spell once per day.  Charisma is your spellcasting ability for these spells. 

Foulspawn Feat

Prerequisite: Demodand-Spawn Tiefling

• You are always considered to have proficiency when making saving throws against divines spells.

• You add your Charisma modifier to initiative checks.