Mass Hysteria is a 5 Mana Cost Rare Priest Spell card from the Rastakhan's Rumble set!
Force each minion to attack another random minion.
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Mass Hysteria Card Review
It’s a very interesting card. For 5 mana, you will often get a full board clear, which is not something a Priest can do with other tools, such as Holy Nova. Right now, the card’s usage might be limited, because most of the slower Priest builds still run a Dragon core with Duskbreaker, but the card is going to rotate out soon.
The great thing about this card is that it works well against both wide and tall boards. If your opponent has a bunch of small minions, them attacking each other most likely means that everything dies. But if your opponent has only two big minions, you can also use it in a way Supercollider would work, to force them to attack each other. Of course, you having minions kind of messes up with it, but let’s be honest – if you’re playing a Control Priest, the chances are that you have no board anyway.
Now, the problem is when your opponent has a mixed board, with some big and some small minions. Then, sadly, the card will heavily rely on RNG to clear the board. That’s the part I dislike – on many board states (e.g. Even Shaman with a bunch of Totems and a few minions, or Even Paladin with two midrange minions and two 1/1’s), the outcome will be either a full board clear or the card will do almost nothing depending on how lucky/unlucky you get. Yes, there will still be a skill in identifying those kind of board states and trying to not play it then, but sometimes you just don’t have a choice. That’s why I think that Brawl is a stronger card in general. It’s just more consistent – no matter what the board state is, you can always clearly see the worst outcome – the biggest minion on the opponent’s side survives – and try to prepare for it. You will always have a single minion surviving, but in this case, on a more complicated board states, you basically have no idea what is going to happen. But
I think that even if not right now, the card will see quite a lot of play after the rotation happens. Psychic Scream is absolutely amazing, but Turn 7 is often too late – Aggro and Midrange decks can kill you by that time if you don’t clear the board earlier. And let’s be honest, Holy Nova doesn’t really cut it when lots of minions have 3 health. This, while not exactly most consistent in some matchups, will probably be the best option anyway. But I think that this kind of effect is hard to theorycraft about, we’ll just need to wait and see how it works in practice.
Card rating: 7/10