I’d love to have a boon on a chisel or a totem that would swap out a block placed and chiseled in the world with one in my other hand, as long as it were compatible with the chiseling.
A use case for this is when I’ve got my goo farm all set up with lava in the chiseled blocks, but I decide I want to try it with iron instead of brick around the edges, I can do it without having to pull everything apart first.