you know i thought it would take Oro some time to adapt to his new body. He quickly absorbed white zetsu within a matter of a few panels. Before Sasuke joined Oro squad it took him quite some time. Also odd exchange between Minato and Oro..So Oro studied lost jutsus and info on lost clans. A Uzumaki jutsu from the start. Vaguely stated but I guess that is as much as we are gonna find out about the Death God mask...Hokage level intellect at that age....damn Itachi...