A little train that acts as spawner, the blocks are created inside the control post (directly above the flag) and teleported to the train.
the train can be moved to any position and has steam thrusters to blow away the blocks wich land then nicely at the side of the map. stacked on eachother.
blocks can be spawned in groups of 1, 2 or 3.
there is also a second spawner wich drops the blocks directly onto the level where the flag is located.