This is my self -made tnt cannon
Its named "the witherer'' because it uses 3 dispensers providing the tnt charge (simular to the 3 heads of the Wither)

it is designed for simple use so you can fire it with one click of the button.
it fires 2 tnt shots at once that explode 1/2 second of each other.
you can stay safe inside the cannon while covered from arrows or fire charges
Length: 8
Height 7 (one in ground level)
13 blocks wide
DO NOT CLICK THE BUTTON TWICE AFTER EACH OTHER!!!
wait until the shots are fired.
Please diamond if you liked this project ;-)