A subterranean Agarashi. That means it's an ugly demonic thing with lots ot tentacles. Should be in an anime film but isn't (it's in book one of Joe Dever's Lone Wolf series, hiding under a hill). Pretty low combat skill, definitely beatable.
You have come to a hill. Do you want to:
1) go under the hill and get eaten by a Burrowcrawler, or
2) climb the hill and get eaten by a Kraan instead?