Kikyo and Young Kaede in “Unfinished Business”

Kikyo

You've improved considerably.

Young Kaede

Thanks.

Kikyo

Next is the Arrow of Sealing.

Young Kaede

Arrow of Sealing?

Kikyo

That was the Arrow of Sealing. We use it for demons who are utterly invincible. I warn you, though, beware of this tree.

Young Kaede

The Sacred Tree?

Kikyo

If you seal demon onto this tree, the demon's body will remain perfectly intact. They will only awaken when the one who shot the arrow desperately wishes for the demon to revive.