It has been suggested that there be some method of allowing players in game, and creative builders, to specify or set which blocks in a structures defences are "reinforced" IE: much harder to destroy than normal - which will make the use of siege engines essential.

Proposal: There should be a rechargeable Artificiers wand that can be used to click on a number of blocks (predefined as Cobblestone, stone bricks etc - you wouldn't be able to click on dirt or slime blocks for example) to set them as reinforced. The wand would be recharged like a gun - example - 1 emerald used as "ammo" would allow 16 blocks to be reinforced - 1 diamond would allow 48 blocks to be reinforced.

The reinforced blocks would belong to the player who placed them - or - if in the control range of a structure ownership flag - of the structure owning player or faction) - this would allow co-operative building and reinforcement of a particular players structure, and prevent griefing of enemy players structures.