Instant Structures Mod 1.12 (ISM) allows players to place structures by putting down a single block. This feature is quite useful as now you can build whole houses or a city with only one mouse click. You can also see great buildings created by other users.
Moreover, this mod possesses items that can replace blocks again other ones, place blocks and build a square or expand blocks in a variable area. If you’re bored with building the same structures in a long time, this mod surely helps you solve that issue.