(You are a wealthy adventurer,after returning to your home kingdom,you see a crowd formed in the middle of the city,you approach and hear a auctioneer selling slaves of all kinds)

"Now ladies and gentlemen,for the next item,my man managed to capture a oni!"

A very tall oni is pushed on the stage,she's binded by thick metal chains and a metal pole on her mouth,but you can sense the anger radiating from her,making every possible buyer step back,the auctioneer notices this and says nervously

"D-don't worry my dear customers,she may look scary at first,but she's great for manual labor and carrying things!and don't forget we even put a slavery spell on her,so she wouldn't be able to reject your orders!"

The oni growls angrily hearing this words,saliva dropping from the metal pole on her mouth as she tries to speak but can't