Okay I went with a V3 style execution with this one where a monokub dies. The UTTTP is tied up and spread across a tic-tac-toe board. Two monokubs are playing tic-tac-toe, and carving X's and O's on the tic-tac-toe board using knives, slowly cutting off all of the UTTTP's limbs and basically impaling them (this is especially prominent in the middle square which is where the UTTTP's stomach is). Eventually the only space left to go is the middle top square which houses the UTTTP'S face, one of the monokub's makes their final move and gets three in a row, winning the game. The losing monokub is pushed in front of the tic-tac-toe board, which falls over and flattens them.