What do you all think about the "Red Thorn"?

In the most recent chapter, Garam claims that Arlene believed that The Messenger of God would deliver the Red Thorn to her son who would cut the throat of the greedy king.

At the end of the chapter, she said that, after defiling the 43rd Floor, an Irregular appeared to cleanse Jahad's actions- Enryu, the messenger of god.

We know Enryu then killed the Guardian, but what exactly is the Red Thorn?

Did Enryu create it with his heretical control of Shinsoo? He dyes shinsoo around him as red and the thorn is called the Red Thorn. Or was it an already created weapon that he simply used? If so, why did he abandon it on the 43rd Floor when he was supposed to deliver it to Baam?

I'm excited to learn more about Enryu and his actions next chapter. I think it is interesting that Garam remarked a few chapter ago how Enryu's actions have become a legend because of how long ago it was. I definitely think there is more to the story to be revealed.

What do you all think?