Whatever kind of monster it might be, no matter how special, it was ultimately just an entity of energy.
In truth, it was much like a Tailed Beast, and since this place happened to be where its soul resided, using the Reaper Death Seal was the most fitting choice.
The notion that one had to rely on the priestess of the Land of Demons paying the price of her life to seal it was, in Orochimaru's eyes—or rather, in the eyes of the Reaper—nothing more than a slightly oversized grasshopper.
Chapter 230