To expand on this:
There are, essentially, 3 tiers of Treeman.
1. You've got your regular ol' Treeman, centuries to a few thousand years old. These are the most common, there are thousands in Athel Loren but not all of them are active at the same time.
2. Then you've got the Treeman Ancient, who is multiple thousands of years old, and is far more powerful. These guys often wield powerful magic, rather than the more physical bashing and smashing that the regular Treemen do.
3. Then there are the Treemen Elder Ancients, the true oldies. There used to be many, and then there were 3. The truth of this is, they all started as your 'basic' treeman, but they survived the First Chaos Invasion of the world, and continued to do so for long afterwards. Thus, being the Elder Ancients. Such is their connection with one another, however, that their powers flowed into each other when they expired. Thus, the more of the Elder Ancients died, the more powerful the survivors grew. A tragic sort of Highlander thing, it seems. But Adanhu expired in the act of cleansing Ariel due to the sheer power of corruption and taint left in Ariel when she was super corrupted by overdrawing on the dark magic taught to her by Morathi and her wounds from Morghur. She learned how to better temper utilization of the former, but was grievously wounded by the latter more recently. Coeddil, well, he fell to Chaos in his brooding and was an enemy even before that terrible fall, slaughtering the elves during a painful winter indeed. And now, only Durthu is left as an ally to the Asrai, and he's not entirely sane either. But nor is he nearly as crazy as Drycha is.
