I am having the same issue in Avalon. I have attacked, fought and won against Fire Spitter and Bane Wyrm. Neither gave me anything and I did have the Wyrm Animus enchant on the hits. Anyone know if there is something up here?
Actually got my answer. Must be level 11. Duh. Wish it would grey out the purchase of the animus spell or say that as you purchase it what the level is to collect it.