I came off with this idea after playing Chrono Trigger that sometimes your character can be hit with a spell which causes them to attack on their own accord either hitting the enemy, OR going after one of your characters. There are plenty of strategic elements do wanting this pulled off in the middle of a match, but it makes gameplay interesting when you have someone who just temporary lost control of their character. Either Hex removal or toughing it out will get rid of it.
I also think this could be imposed as an effect with being cursed during certain missions/quests that would have your character turn on everyone within time or at random.
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