Sealing

Kaoru Sakura's sealed corpse lay in an open space on the street, with a complex magical array laid out beneath it.

Illya was setting up the final magical barrier some distance away.

Although sealing Kaoru Sakura had not taken much time, arranging the magical array and barriers had kept Illya and Sasuke busy until evening.

The setting sun hung on the horizon, dyeing half the sky a fiery red.

To kill Kaoru Sakura completely, they could only use a magical barrier to destroy her soul.

After Illya finished setting up the final barrier, she returned to Sasuke's side.

"Sasuke, when you activate the technique..."