Just a quick thought, if you look at the Delver page on the Coppermind. There’s some history that implies the Delvers didn’t care about the physical world, and Cytonics didn’t draw their attention back in the D.E. Era. I know humans and the PC we’re pretty new to cytonics, but other species had been using them for some time already. So what changed? Maybe someone managed to summon or even kill one? I actually think this is pretty unlikely, but I notice the connections between Detritus and Delvers and it got me wondering. Why weren’t the Varvax and the Tenasi, already powerful cytonic users, worried about the Delvers or Eyes before?