Go to the hunting grounds in 65,000,000 BC and wait until it rains. Find Nu and talk to him at the exact time it stops raining. He'll react like he usually does when you talk to him, but he'll go back into the bushes. He'll give you the 3 petals, fangs, feathers, and horns (and the Third Eye, if you haven't fought him once already) that you would get if you win - without having to fight him!
Submitted by: Stephen Krokowski