Jesus.
"For my flesh is true flesh, and my blood is true drink."
The RCC has the chutzpa to claim to be "literalists" in interpretation of the Last Supper, but then they ignore the other literal aspects of the situation. If you really were literalists, you would meet the other literal requirements, but you can't so you don't thus you aren't. What is done in the Mass bears no resemblance to the Last Supper and is truly an imaginative creation of those who were far from literal believers.
Was He alive when He said that ? Was he inviting them to have an arm or a leg?