Something i found while i was messing around i found a Structure block in the /setblock command... it has The letter S all over the block so im not sure what is going on but i think it was in i sneak peak of 1.9 that serge posted but i might be wrong... if you want to get this block yourself type in the command here /setblock ~ ~ ~ minecraft:structure_block (UPDATED) apparently the Structure block was for the developers to copy and paste dungeons... still just a rumor here but we think players will be able to use the Structure block in 1.10 (UPDATED) as of now we can use structure blocks in the latest snapshot of minecraft 1 .10