Mu You was unsure, but he always felt that these small dragons weren't all that smart.
A more likely reason was the fear that he would die along with the Blood God Body, as after all, these small dragons didn't know that the Fool could resurrect.
Regardless, in the current situation, Mu You couldn't die because if he did, these four small dragons would likely all die here, and the relationship with the Dragon Clan would have to be managed from scratch.
[... You are being repeatedly chased and beaten by the Seam God, without a moment to breathe. Suddenly, the four small dragons come charging, swiftly surrounding the Seam God, finally providing you with temporary relief...]
