If you can think of it, she cheats worse than that.
You encounter her in a vision of the past in Avalon, and that young self (from the time before Ravenwood was founded) could throw at will Earthquakes as well as one of the highest level Ice school spells.
I'm half-expecting the modern Morganthe, with her Deck of Shadows, to be able to cast all 7 rank 9 spells simultaneously as a single action for 1 pip.
If you blade she earthquakes and mammoths If you trap she earthquakes, power nova, and mammoths she will randomly mammoth random players at anytime, i've only seen up to five times in one round
the rules seem to be no blades no traps no shields no auras and use only level six and below spells. Hope that helps
She mana burns you if you have 8 pips, but technically you can still hit her with a level 8 spell. Here's the deal: If you have 8 pips but have chosen to cast the spell that turn she will mana burn you but the spell will actually be cast anyway. If you haven't clicked the spell to cast it, you simply lose the pips. It's best not to let it get that far, however, and try not to let yourself get past 7 pips. Oh, and that's counting power pips as two pips just to be clear.
I notice she'll target the one with the most pips. The faster you can get rid of your pips, the better. Anything four and above pips and she'll mana burn you.
So, try to keep it to four or less pips at any given time. Use low pip spells, enhance them with colossal (or other) and for goodness sake, load up on health, because you'll need it.
I tried doing it alone, but she kept hitting me with woolly mammoth every turn, so I never had a chance to even have a turn to do anything.
The second and final time, I had only one other person, and we managed to whittle her points down with enchanced low-pip spells. Lots and lots of health, spritely from pets, and once in a while I'd conjure up a mid-level Life henchmen to help heal, and since the henchman had more pips than us, drew the attention of Mr. Mammoth.