Deepslate Efficiency

I've heard a lot of people complain about how slow it is to get a lot of deepslate and I agree. With 1.18 around the corner you could add a new enchantment to the loot table of whatever chest the warden is protecting. This enchantment would be mutually exclusive with efficiency and do the same thing only slightly better and only work on deepslate. At max level with haste II you would be able to instamine deepslate and deepslate ores. It would add a nice incentive to find a warden, and I don't think it's overpowered since you would need to make an extra pickaxe and still need haste II. I haven't thought of a good name for the enchantment yet.