All you have to do is die, and you can become invincible.
Fang Hua exclaimed that it was easy. Staying alive was hard, but getting yourself killed? That was simple enough.
The Geo Archon died at the Rite of Descension? I'll take the blame!
Fang Hua: “That's right, I did it! Mr. Zhongli, if we dance on the Archon's grave, do you think those Archon fanboys in Liyue will kill me?”
Zhongli: “...By generally accepted reasoning, you would die very quickly.”
Fang Hua: “Excellent! Let's go hire a band. Mr. Zhongli, didn't you say you knew the greatest bard in all of Teyvat? Let's hire him! Today, I'm going to dance on the Archon's grave!”
Zhongli: ?