Talk:Thunderwyvern/@comment-9347887-20130510042015/@comment-7288461-20130510101705

This is only speculation (since I've not yet fought one of these), but I don't think the Thunderwyvern Horn drops literally by breaking it's horns, like the Dragon Horn does.

It's essentially the 'Thunderwyvern variant' of the Firedrake Fang and Frostwyrm Scute, neither of which would be a 'horn drop', so think it would function as a regular drop.

Having said that, it still doesn't explain why you wouldn't get any after having killed so many...