The Sift should let us purify ancient cities

I think it would be really cool if the Sift eventually gave us a way to purify an Ancient City. The Sift feels almost like the complete opposite of the Deep Dark, being bright and full of life while the Deep Dark is covered in sculk and feels almost corrupted. Maybe there could be a very rare item found in the Sift that works kind of like the core of a conduit. You would have to place it inside a specific structure or frame before it activates, and it would only work inside an Ancient City. Once activated, it could slowly start purifying the city around it. Sculk veins could recede, shriekers could become inactive, and the area could gradually become safe. I don’t think it should just delete all of the sculk either. Some of it could change into a purified version, or plants and blocks from the Sift could slowly start appearing as the city is restored. It should be difficult and expensive to do, but I think being able to eventually reclaim an Ancient City after surviving and exploring it would be a really cool late game goal.