BreadMan
Terrarian
There are already quite a few ways of increasing building speed, but I feel like it's not fast enough, doing something like a big project can take far too long (I have spent whole days doing builds, without being able to finish them) so I think having one more way of increasing the building speed further could be good. This could be an accesory, a consumable, or something of the sorts. Not sure if there's any limitations regarding building speed, but if so, do tell.