Presenting My 250 Subscriber Special Ultima Ghast Cannon Tutorial!. I'm So Excited to be able to give you all this design. Only the 3rd Slimestone Machine I built in Minecraft. With Dual Long range TNT cannons, dual juggernaut 2.0 missiles, and if dual Ghast Missiles making their début on a Slimestone Machine still isn't enough, the Entire machine is composed of 6 Ghast Cannons. I just real hope everyone enjoys!. Fireworks by: My Daughter Carina. Materials:. -566 Slime Blocks. -221 Blocks Of Choice(movable). -55 Sticky Pistons. -143 Pistons. -160 Redstone Blocks. -23 Glass of choice(can be movable blocks as well). -13 Half Slabs. -6 Temporary Blocks of choice(to place the Ghasts on). -117 TNT (Plus more for TNT Cannon). -Several Redstone Torches(for engine). -18 Immovable blocks(obsidian, furnaces, etc.). Dimensions: 27 blocks long(front to back), 31 blocks wide, 27 blocks tall. 27 x 31 x 27. How to Use the Ultima Ghast Cannon:.