Thank you for this wonderful game. Ive been on an Anima: Prime kick for like 2 years now, and your Prime Spiral write-up has been incredible for working on my own WIP hack of the game. I'm planning to start running this game in the next month or so, with a few modifications from Prime Spiral.
I think in particular that a change to Tier 4 rules and the Primal Spiral suggestion of switching to more granular d10 rolls and Enlightenment, could allow for some nice rules for a Mega Evolution style mechanic, with a new type of evolution Procedure that unlocks access for a tier 3 mon to become tier 4 and Transcendent for a single fight, at the cost of having to spend influence to activate it. This also opens up a cool new setting option middle ground between Breech and Lost Chains, for Mundane trainers that are able to become Enlightened through a similar procedure.
I'm also toying around with on a new mechanic for Breeding/Baby Eidolons, slightly inspired by the Pattern system in Breech, where players can obtain new Eidolons that start at Tier 0 and only at Enlightened instead of Illuminated like other Eidolons, but allows for more flexibility in shaping it into specific facets through having an additional evolution chance.
I'm gonna be playing over tabletop simulator (Which I think is the best way to play this digitally, given how much it involves moving dice between pools, which other VTTs dont really support) and would be happy to post a link to the table for anyone else, once I finish scripting all the character sheets.
Thank you again for all the work that went into this!