Mobile Tank Cannon

right|300px
The Mobile Tank Cannon is an incredibly powerful and automated reloading gun. It is two handed and fires a ton of buckshot at an enemy, causing massive damage but a hefty reload time. It is one of the rarest drops in the game, nearly on par with the black skulled weapons and many other artifacts of worthy value.
===Source===
The Mobile Tank Cannon can only be dropped from Mechanical enemies, in the category of Tanks. The chances of getting a drop from these foes are 1.5%. Getting this drop is a huge achievement for many players, and is very valuable on the market. Mechanical elites increase the drop to 2%. Some players however have gotten over 600 mechanical kills and not received one.
It can be also dropped from a staked duel or the Nether Realm FFA, or being traded.