Winged Terror is a gargoyle who flies slowly around the crypt (the architectural portion) of Hib's Deadlands of Annwn. He cons purple to 50.
You can wait for him to pass near the door at 17.6k, 5.1k. Eventually he will fly by.
When he appears, pull him with a ranged attack . He bolts and melees. When he gets low on hitpoints, he calls for help, and nearby mobs come to his aid. You can prevent his calling by killing him fast. Another way to deal with his calling is to pull him at the start of the fight through the doorway into the passage that leads to the rest of the zone. His friends can't hear him call when he's far down that passage.
Winged Terror 's trophy was added to the game in version 1.75 on April 6, 2005. For a list of other trophies that were added at the same time, click here.