"Forbidden Secret Technique: Dead Demon Consuming Seal!" (禁術奥義!『屍鬼封尽』, Kinjutsu Ōgi! "Shiki Fūjin") is episode 73 of the original Naruto anime.
As the battles across Konoha rage on, the Third Hokage's shadow clones use the Dead Demon Consuming Seal to seal away the souls of the First Hokage and Second Hokage. The Third is outraged when he realises that the bodies sacrifices to reanimate the First and Second were none other than Orochimaru's students, Zaku Abumi and Kin Tsuchi. The Third then rushes at Orochimaru, ready to seal away his soul as well, though he is stopped as Orochimaru's Kusanagi stabs him in the back, which Enma fails to prevent. As Orochimaru wonders why the Third did not move out of the way, the Third reveals that the Dead Demon Consuming Seal is a self-sacrificial technique and that he would have died anyway. Meanwhile, Sasuke again catches up with Gaara, and Kankurō prepares to hold Sasuke off while Gaara escapes with Temari. Before they can begin, Shino Aburame arrives to fight Kankurō, telling Sasuke that he has unfinished business with Kankurō since their match never happened, thus allowing Sasuke to proceed pursuing Gaara.