Curse of inverse

I was mining for obsidian and was absolutely miserable. its slow, boring and an all around unpleasant experience. To combat this issue faced by myself and many other late game players I thought of a new curse, which I believe to be a feature which could be greatly expanded upon. The curse if inverse (it rhymes >:) ) would be applicable to hoes, axes and pickaxes and as the name suggests would inverse mining speeds! for example this could mean that obsidian mines at the rate of stone, while stone mines at the rate of obsidian, this could make obsidian and possibly even deepslate instaminable! (if that isn't a feature to overpowered) This would be a curse as you would never want it on your main pickaxe, but would be an invaluable asset to late game players who need large amounts of hard to mine recourses.