Leventre

A huge, gray monster that has an additional mouth in its torso. When it hungers, anything that enters its vision will be taken as prey, and it will swallow even large animals and monsters whole. It is tenacious, and if its prey tries to flee, it will chase them down with alarming speed, given its size. It is so swift that it's said even a winged dragon or bird cannot outrun a hungry ruvantoru.