proteron

Extract from Encyclopedia Calyptica, the Zoological Institute edition: Regarding the Proteron (Brontoflex)

Originally dicovered by explorer Apsara Sofia Rozenkreutz and nicknamed the Brontoflex until it was officialy identified as a seemingly extinct herbivore species, it's now known as the Proteron. Its huge skeletons are still found around the entire Eudoria continent, but as Rozenkreutz's discovery made clear, small population have survived the climate changes in faraway spots of Planet Calypso.

The Proteron relies on its size and cell regeneration speed, but unfortunately that's also its greatest weakness. The Proteron needs to feed on trees to survive and its mouth has adapted over the course of evolution to actually swallow entire trunks whole. Since feeding is an extensive and time-consuming task for the Proteron, it's usually exposed during these periods and therefore travels in heards, leaving deserted trails in its path. These trails make the Proteron easy to track for any hunter, but the sheer size of the beast still makes it a formidable enemy.