Building, defense and attack

In Minecraft, anything can be torn down by mobs or players, especially in anarchy servers, but, what if we wanted to make a structure that is harder to destroy by design. We have obsidian and netherite blocks, but obisidian isn't vary viable and netherite can be easily stolen, so, maybe some more building blocks for defense, and new ways of attacking buildings

Armored Tiles

Crafted 6 with 1 Netherite Ingot and 4 Iron Ingots. These tiles can be placed on the side of some blocks, like Glow Lichens, and on that side of the block, and it has the blast resistance similar to obsidian. Can be dyed

Metal Blocks

Crafted with 1 Netherite Ingot, 4 Iron Ingots and 4 Copper Ingots. This block is affected by gravity, and can be launched with TNT, however, instead of exploding after a while, it makes a smaller "explosion" when it lands somwhere, but it remains there, instead of being consumed

Assembly structures

If we want to make a cannon, we have to build it where we need it, but what if we could build it somewhere, and then move it where needed? Maybe some new item/block that allows us to make movable builds with minecarts, that would also act like they're still blocks