It might have been passed down from the Ether Star Alliance era.
In certain eras.
Perhaps they represented the same thing?
Matthew couldn't help but ask,
"I once heard a god of the Heavenly Palace mention the six secret treasures.
"I wonder if the secret treasures are the secret keys."
Mayer thought for a moment.
" It's possible. For some powerful items, it's common for different eras to have different understandings and names."
Matthew was intoxicated by Mayer's profound ancient knowledge, so he continued to ask,
"Then where did the six secret keys come from?"
Mayer smiled helplessly.
"Sir, didn't you notice that I'm already dressed?
" I'm not your teacher. I'm not obligated to answer every question you ask. Do you understand?
"That's all for today's answering session. It's impolite to ask again."
Only then did Matthew notice.