It gives you that enchantress effect whenever your (or anyone else's) enchantments leave the battlefield as well
Well, after a few years, its evidently showing the best results in EDH
Wither/Persist Wither is a slam-dunk for the damage caused by a Morgul Blade, or the continued assault from Trolls and Uruk-hai berserkers
At the start of each precombat main phase (the key here is NOT the turn it enters the battlefield), you can start to remove cards from graveyards to either gain some extra mana or drain your opponent for two damage
Atraxa, Praetors' Voice - No Commander is more heavily played than Atraxa(according to EDHREC.com)
But with Sauron priced at such a high mana value, theres a worry that this deck will sit on its hand and durdle itself to death before the pilot can even cast Sauron or recur any of its amazing threats