Taboo!
Just like how Xu Qing had the right to use the projection of the sect's magic treasure after he became a Sequence, the heaven's chosens of the Seven Sects Alliance could also use their sects' foundation.
However, very few people had the qualifications. Moreover, they were treated as encouragement and protection.
After all, the magic treasures of the Seven Sects Alliance were in the levels of Taboo. There were many restrictions when using them. If they wanted to maximize their effect, they needed a specific moment.
Saintly Star had extremely rich combat experience. He didn't summon the Taboo projection immediately because he wanted to create an opportunity to perfectly use the power of the Taboo.
He had realized that it wasn't very easy to snatch Xu Qing's life lantern. He had to prevent the other party from escaping at the critical moment or use a jade talisman like the disorder teleportation.