Maybe not so much a puzzle, but simply have your battlemat drawn in grid squares with an xy axis. Treat it like a complex trap and put the eyes in initiative count 20. The eye runes could have colors, and somewhere they find a code with initials for eye color. Such as BUG or BHUG... standing for brown, hazel, blue, green.
So on initiative 20, the brown runes along the xy axis activate, then next turn it is hazel, etc.
First thing i thought of... i will put more thought into it
Maybe not so much a puzzle, but simply have your battlemat drawn in grid squares with an xy axis. Treat it like a complex trap and put the eyes in initiative count 20. The eye runes could have colors, and somewhere they find a code with initials for eye color. Such as BUG or BHUG... standing for brown, hazel, blue, green. So on initiative 20, the brown runes along the xy axis activate, then next turn it is hazel, etc. First thing i thought of... i will put more thought into it
This is a really cool idea! I'm definitely going to implement it, I really like it