Hello, I am happy to answer your question.
What kind of weapon is the Tianya Mingyue Sword for house construction? An introduction to sacrificial weapons
What is a weapon for Tianya Mingyue Sword to build houses? An introduction to sacrificial weapons. House construction is now possible in Tianya Moon Knife. But during the first round of house construction, a weapon needs to be used for sacrifice. So what weapon to use? Come and take a look!
The official Weibo has actually posted an explanation:
The weapons submitted in the first round of Feng Shui materials refer to the main weapons or secondary weapons that can be equipped, not the swords in the Feng Shui ornaments ha.
I hope it can help you, please adopt it.