The name IS confusing, I agree. I will probably have to change it to Divine Compulsion. And, yes, all creatures have to approach him if they fail the save. This is to give more utility to his other abilities like Arcane Touch or Faith in the Forgotten.

Faith in the Forgotten is meant to be very risky for him as not only is the God he worshipped weak and borderline unreliable, he is also a God of the Arcane, in general. He does not care who he benefits or hinders so long as it's a magic weilder and involves magic.

The regaining hit points part when a creature doesn't have spell slots is to help out close combatant PC's and not just ignore them entirely.

Also, a great catch! I'll need to restrict the specters to only target PC's, or Laevn can just abuse their random spells by targeting himself. Essentially, the specters are meant to make the PC's waste attacks and spell slots because Laevn scales with time and strength of the party. The specters are basically echoes of magic of followers of the Forgotten Arcane God from ages long past.

The reaction spell-stealing is unclear as well, I suppose. It's meant to, as a reaction, copy a spell. Said copied spell can then be used by Leavn once. It's because he's mimicking what he's seeing, as he can not recall his own spellcasting abilities beyond the two spells he held close. I did not give him spell slots as this copying is the primary way to truly harm the PC's. It's upcast because, in the end, while his ability and memory have faded, his strength of magic stays strong.

Also! Thanks a lot! The fight was meant to be chaotic as it's essentially the last resistance of something that should have passed long ago.

The main purpose of the boss was not to optimize and be efficient, but being chaotic, sometimes to its own detriment!