FYI, I do have the entire spell worked out in my head but it's super complicated and I'm REALLY bad at writing down detailed scenes.

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It's really cool, uses a a spell circle made of white sand with the words for a spell written in Enochian forming a filligree pattern; The casters stand on each side inside a smaller circle which form part of the pattern and link hands with the person it is being cast on. The divine caster (in this case Richard) channels energy from himself, through the subject, and to the Djinn (in this case Argus) who passes it back through to the caster to create a sort of mana circuit.

This allows the Djinn to tap into the Divine caster's holy-charged mana while inside the subject's mind and use it to heal damaged memories and links from the inside; the healing mana will then trigger a physical response in the body and cause it to start repairing degraded neural tissue with complete accuracy to the original state.

Essentially it allows a Djinn to use healing magic (something they typically cannot do) and cast a precise, targeted spell on the inside of a person's brain.
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My problem is, while I'm good at technical details, I'm bad at translating that into something which is fun to read.