One of the Sin Series of Feats

Possessing an excessive amount of wrath and being prone to anger, it actualizes into a form of power allowing you to vent that wrath as long as possible. You gain the following:

Add your AC to your Health Pool

Once per long rest, you can actualize your wrath as fire that enhances your attacks, adding 1d8 fire damage to all attacks for 1 minute. Add 1d8 every level up to 7th level. 

You are disadvantaged against being Charmed