Yes, mystic mage is the deal.
We fought Diablo boys and all 5 of them had it, kind of funny...I think they had Khan just spamming plauge.
The few EVO around all had it and LP uses it well.
After fighiting for a while I can see why, nasty spell, lets the mage dump mad damage.
With the ability to heal, use stone, trigger and drop loads on toons, myst looks like its here to stay!
*wanders off to train*