Vyrewatch

The Vyrewatch are the vampiric secret police that receive blood tithes from the population of Morytania and suppress any resistance to the Drakan overlords. They patrol the skies of Meiyerditch and will ask the player for a bloodtithe. If the player refuses he may escape the tithe, be forced to give a tithe, or be sent to the mines. Vyrewatch have combat levels ranging from 105 to 140. You can fight the Vyrewatch; however, they are currently immune to every weapon except the Flail of Ivandis. Interestingly, if you hover the pointer over a female vyrewatch, as it's taking off, it changes to "female flying vampire" for a second.

Drops
Vyrewatch corpse