After seeing many people struggling to find the Ancient Hermit in Cathal Valley, I thought I would make a small guide to help locate him.
Zimmeron's Wrath has a chance to drop off the Ancient Hermit.
Ancient Hermit spawns in 9 different locations, and is on a 10 minute respawn. At some locations he takes on the appearance of the other creatures near him, but will always revert to an old man when engaged.
Here is an overview of the locations as well as what he looks like at each spot.
For more detailed views of each spawn.
White Wolf
Crystalysis
Minor Lusus
Giant Lusus
Valley Spider
Treant Elder
Field Spider
Old Man
Happy Hunting!