Darkstalker's Teeth is a mountain range mentioned in Darkness of Dragons. Winter mentioned that he couldn't go over them, because no IceWing had flown over them and survived. This was due to Darkstalker's forcefield that he created over this area thousands of years before in Darkstalker Legends. However, Winter got over fine, because he was wearing an earring that protects against any of Darkstalker's spells. It was also enchanted so that Whiteout and Arctic could fly over. It is one of the bigger mountain ranges in Pyrrrhia.
After a short debate with Clearsight and Vigilance over how to keep the IceWings out of their kingdom, in which Darkstalker suggests multiple times that they wipe out the entire tribe, Darkstalker enchants a forcefield to kill any IceWing flying through.
Qibli, Winter, and Anemone meet near Darkstalker's Teeth. They discuss several things, until Winter says he can't go over the mountains without dying. Qibli tries to convince him that everything will be fine, pointing out that Winter is wearing an enchanted protective earring. Winter agrees with some difficulty, and survives.