I tried to iterate its design a bit through thumbnailing and sketching, but I ultimately ended up using the original design with some variations. It was useful to figure things out, however.
Colors were mostly clear from the start, but some experiments and variants were also tested.

I had the honor of designing the recently added Imago eidolon to Collective Unconscious! Here's some pseudo-official concept at I did for it about a year ago. The rightmost sprites were drawn by bWF5.

#collectiveunconscious
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#ynoproject

today, i felt a strong pulse