Dailysketch: Cyberwood Ferroants 11192016

Ferroants were engineered by cyberplants to digest and remove metal remnants of human civilization.  As the Cyberwood expanded, new cyberfauna like Ferroants would emerge to satisfy the cyberplants' needs.  Ferroants focused on metals, and can grow to the size of a horse.  Humans were wary of them, as one ferroant indicated a colony that could tear them apart quickly.

But on the other hand, Ferroants provide processed iron and steel without having to scavenge hard.  A colony could be exploited, so long as it was done subtly without drawing the ferroants' ire.