Ibis Priest commanded the Cult of Osiris and, according to Dean, an army of . One of these mummies, named by the Venture boys Mummy Mum Muggy, carried a magic scepter. Under his leadership, the Osiris Cult built a time machine. They somehow discovered or created the Perfect Man, a seemingly strong person physically but acting with more animal-like intelligence.In the "Previously on the Venture Bros" recap of Part I of Escape to the House of Mummies, the Ibis Priest is seen introducing The Venture Family to this Perfect Man. The Perfect Man hatches from a great egg in front of their very eyes.. Shortly thereafter, Doctor Thaddeus Venture offends the Priest. In retaliation, he condemns them to the Hall of Sorrows. This is where Part II picks up.