Black Sun Armor

Your inner raging sun becomes impossible to hold back, you summon your signature move, Black Sun Armor! Black armor that is as beautifully crafted as it is terrifying.  As a bonus action, you transform for 1 minute. You gain the following benefits while transformed:

• You gain temporary hit points equal to 1d10 + your warlock level.
• Once during each of your turns, when you hit a creature with an attack, you can force it to make a Wisdom saving throw, and if the saving throw fails, the target is frightened of you until the end of your next turn.
• You are immune to the frightened condition and fire damage during this time.