Oligochaeta, subclass of annelids which contains earthworms.
Nature Spirits, Metal Empire
4'8" (typical, can rear up to be taller)
Oligomon fancies himself an intellectual; he loves to tout his own expertise and show off to an embarrassing level. Sadly he is far less intelligent than he would like people to believe, often spouting a lot of words and doing very little else. He's lazy and opportunistic, holding very few loyalties and generally being an unlikeable smug git who will slither away the moment things aren't going his way.
Slate Shrapnel - Oligomon fires bursts of gravel from his mouth like pellets from a shotgun. If he’s been digging, he can briefly increase the rate of fire to something akin to a machine gun.
Terrorformer - Oligomon digs deep underground and spins rapidly, rupturing the surface and sending pillars of rock up and down around the battlefield.