When you misgen obsidian you have to mine it out for ages, and if you misgen an entire wall without noticing it, it could mess you up real bad and you'll have to mine out the obsidian which would take quite a bit of time even if you "trench" it with TNT, I think adding some sort of tool that would be able to instantly break obsidian (for example an enchanted obsidian that would just insta br..
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