Ok here is more specfics
First statistics:
2/3 of the time she is going to get out a jinx card into play on her turn (or the one shot that allows her to put up to 4 jinxes into play). 2/3 of the jinxes are ongoing and add a bonus to her damage when the talisman is in her possession. They themselves aren't too bad as only one gets to add that bonus damage (Weak Heart).
Next there is 1/3 of a chance that she will draw a lucky card. Now 3/4 of the time she is going to get a one-shot lucky card that does damage to the group if you then add in the bonus damage for the number of jinxes in play this gets insanse. (more on that later). So when she is without the talisman it's not too bad at least.
Now during her turn she gets another chance to pull a lucky card which she will 1/3 of time (based on the number of cards in the deck and the odds esp since she keeps getting to reshuffle)
Ok then there is the tailsman which has 7 hit points. If you are playing with 3 heroes it can be really difficult (and require great luck) to get rid of it in one round. Assuming you are playing heavy damage dealers it becomes possible. However in turn you are not likely to be able to get rid of the ongoing jinkes in play (which later will be a big problem). But if you take a character (for instance Argent Adept) you have a better chance to be able to get those ongoings out of play. But that character will not be helping to deal damage leaving 2 characters to do all the damage.
Ok so the odds are good that it will take 2 rounds to get the tailsman out of play with 3 heores. Even 3 heavy damage dealers only do 6 points in a round without getting good cards to help with that so they even have a chance it will take 2 rounds. And with only 2 heavy damage dealers it will take likey 2 rounds because again you have to otherwise get really lucky.
So that is 2 rounds where she is pulling cards so far.
Now you have the tailsman gone. You have 4 rounds Max before she has done enough damage to the tailsman to kill her and do 70 points of damage. With 3 damage deals this is going to be a job of work. But with 2 and somone on maintenance trying to keep the jinxes widdled down it's impossible just about.
So that means by now she has had 6 rounds to pull cards and play.
From her normal draw each round: So likely that she has had 2 lucky cards to come out. Now at least those were during her time without the tailsman more then likely so it's not too bad yet. She's just been hitting for a few points each round. But she has been hitting the whole group. She also has had at least 4 jinxes come into play and at least 2 are likely to be ongoing. Now if you are as unlucky as we are she at some point drew the one shot that lets her put a bunch of jinxes in play which the odds are it was at least 1 and there is a good chance it's 3 of them (cause it's been that way each time for us).
Then her extra draw in the first 2 rounds she has a good chance to get another lucky card in play. 1/3 each time.
So by the time she gets the tailsman back she has any where from 2 (if you are really lucky) to all 10 ongoing jinxes (if you are very unlucky) in play. More then likey it's around 6.
And if you have been doing it with a heavy damage group then you haven't really been getting rid of those. And more then likey she is almost dead but just not quite. But now she has the tailman back and at least one member of the team is hurting pretty good from the damage done to them by her due to them having the tailsman.
Now she is going to be doing 7 points to each hero that turn (21 total) just from her base attack. She then has good odds to draw yet another jinx into play. If it is one-shot like imminent destruction she gets rid of enviroments cards (lets say 2 and be nice even though if you were doing damge to her and not dealing with envrioment cards too much it's could be 4 or more by now). She then deals the damage based on the number of cards she destroied. Then (and here is where the issues is) if you add in the bonus she gets from the tailsman for all the jinxes she does an extra 6 points to each character. So she has done at this point 15 points to each character (just in that round) for a total of 45 points. This is along with any other damage done over the other 6 rounds which is going to have been at least 2 each for the first 2 rounds, at least 2 to the player with the tailsman the first time, 4 the second, 6 the third, and 8 the last time (so 20 total points ot that character from having the tailsman) By now the character who took the tailsman is going to be deal if you use heavy damage dealers and were just trying to take her out. So you are down to 2 characters. And if you had someone healing and working on the jinxes the person who took the tailsman is still dead because that is 37 points of damage at least that they have taken minimum.
So there are 2 heroes left. It will take at least 2 rounds to take out the talisman. So she gets to do the 7 points to each hero again the next round.
And that assumes that she didn't get a lucky card on her first extra draw. Cause of the 2 rounds she is likely to pull at least 1 one-shot one of those rounds and a decent chance she will do it both times, either as a lucky or a jinx. So lets say the second time she gets another ongoing jinx out adding another point to her damage now. And she gets to try for a lucky. Last time she didn't get one but this time she does. Now most of them are one-shots, and most of them are damage that she deals to the group. So she gets Fortune's smile out and deals both of the heroes 1 + the jinxes now 7 so that is 8. They have taken at least 2 + 15 + 8 damage just from those 2 attacks and the frist 2 rounds and that doesn't include her minor damage she likely dealt when she didn't have the tailsman. So they are down 24 points which if you were doing just heavy damage dealers is enough to almost have them both dead, assuming they hadn't taken any other damage.
Now she loses the talisman. And starts doing damge the next round to the one who has it. They are going to be toast quick at this point and she gets the tailsman back and party wipe then happens.
Now if the additional damage from the jinx cards does NOT add in to the damage from one-shots like violent trickster, fortunes smile, & imminent destruction. The damage is much less and there is at least a fighting chance for a team of 3. Because 1/2 of the time that she gets a lucky it's going to be one of those lucky cards and there is a good chance that the jinx card listed will come out at least once too, Since she goes thru cards like crazy.
Now sure with 4 or more heroes she's probably not as bad. But up till her there hasn't been a villian that 3 heroes can't take out without too much problem with her it's guarenteed to kill everyone pretty easy. We can't even get her down to half health before she kills everyone.