Earthworm
Even before all the dirt could fall from the creature's body, Toz could already begin to tell what kind of demonic beast it was. It was an oversized worm with a circular maw filled with teeth that could easily shred through the ground and whatever rocks came in its path. Something like a human leg wouldn't even serve as an appetizer for the beast or its meter-wide gaping mouth.
But as it rose, Toz could see an appendage retract into the center of its maw. It looked like a tongue but with teeth all over it. If that thing hid right beneath the surface and waited for someone to step right on it, Toz wouldn't be surprised if the one who fell for the trap lost their leg.