Dark Sun: The Scorched World of Athas
Loathsome insects with a taste for bipedal prey, ankhegs burst from hiding to seize the unwary. An ankheg moves with great stealth, but might be detected by the faint whiff of acid dripping from its twitching mandibles.
Ankhegs dig mazelike networks of tunnels, which might contain other monsters that have claimed part of the tunnel network as their own. Ankhegs are found in nesting pairs, their broodlings rarely emerging from the safety of their tunnels.
Adult ankhegs strike quickly, attempting to grab and carry away a vulnerable target.
An ankheg broodling remains in hiding until an adult ankheg has brought a grabbed victim near.