With the changes to enmity, such that -enm increases enmity decay, it could be a useful idle piece but as Avalon says, is this really worth 250k? Even as a direct drop you'd wonder about what better item you could have potentially got.
Obtained this from Utkux last night. I think it's questionable whether or not it's worth 250k plasm.
It's a nice ring and all, but I don't see WHM's curing with this. If anything, it would probably get put into a Curaga build and/or to add to your -enmity cap.