Bojo's Dominion of Malice

You call forth the spirits of ten sinners to become your minions and imbue yourself with their malevolent energy. For the spell's duration, you become wreathed in evil souls, and you gain the following abilities:

• Your Armor Class increases by 4.
• At the start of each of your turns, all creatures within 10 feet of you take 4d6 necrotic damage.
• You gain the ability to use your action to fire a blast of evil spirits at a creature within 60 feet of you. Make a ranged spell attack against the target. On a hit, the target takes 10d6 necrotic damage and must make a Constitution saving throw. On a failed save, the target is frightened of you for 1 minute. On a successful save, the target is immune to this effect for 24 hours.
• Your size increases to Huge if you weren't that size or bigger when you casted the spell. You have advantage on Strength checks and Strength saving throws, and your weapon attacks deal an additional 2d6 damage.
• You gain temporary hit points equal to your current hit point maximum. These temporary hit points last for the duration of the spell.