After inventing both gunpowder and the very first cannon, Lord Huangpao decided to go a step further; importing and integrating the mythical Cornucopia and Pandora’s fabled box into his next design, he created the P**ty Mouth. Lord Huangpao was never known to be a very wise person.
 
Excerpt from the Scientific Journal of Twilight Sparkle: 
“I can’t make heads or tails of this thing! It has no discernible firing mechanism, literally useless pieces tacked on, and never needs either reloading or even ammunition; that stupid hinge should realistically get pulverized with every shot, and while Reuleaux triangles are a fascinating geometric concept, using them as wheels like this is completely, boneheadedly wrong! I’ve seen this thing shoot everything from molten lava to frozen methane, and even two matching epoxy compounds back-to-back! 
It’s like it was designed to make me mad! 
Even the Omnicon is of no help! Every time I ask it a question about the cannon it just opens to a half-torn page where the only visible words are “It’s magic I ain’t gott”! I’m sure this is the cannon’s fault somehow! 
…All three times I’ve asked Pinkie where she got it, she gave me a different response; “it came to me in a dream”, “It was a gift from Gummy”, and “it fell out of the party cannon while I was cleaning it.” I’m not sure what’s worse; that any of these explanations are possible, or that she doesn’t seem to be lying about any of them.”
 
Ten Legendary Weapons 4/10: Lord Huangpao’s P**ty Mouth