Monsters From The Kaibutsu Ehon

Um, Master Splinter?

kaibutsu_ehon_18

Raigō — 11th-century monk reborn as a giant book-eating rat (a.k.a. Tesso – “Iron Rat“)

Via Pink Tentacle’s post on the Kaibutsu Ehon (“Illustrated Book of Monsters”),  an 1881 book by painter Nabeta Gyokuei.