I love the concept of heroes delving into an ancient library, hooking up to uplinks, and literally 'growing' in power and knowledge. It's creative and nails the 'growth' theme! The dynamic objective placement is also a cool twist.
The rules are mostly clear. Just a small suggestion: 'the hero gains caster(1)' might be clearer as 'caster(+1)'. Still, a fantastic and unique mission that looks like a blast!