Ankheg (77230)
Ankhegs are insectoid monsters as big as a horse, they burrow underground, can detect vibrations in the earth, and spit acid when they are not attacking with their claws. In D&D, these beasts are interesting opponents in dungeons, caves or while travelling overland. I don’t exactly remember where I put an Ankheg encounter in the Storm King’s Thunder campaign, but it was definitely there. Reaper has some great Bones miniatures for these monsters, why not just take three of them?