It turns out to be a massive Tomb(I)

Standing up, he took a small money bag tied on his waist and threw it towards the nervous Fei. "Keep that with you, incase we separate, you can use it to locate us. Make sure you only open it if that was that happened."

Musk was able to remember the situation in the previous ancient door he passed through, if the door is opened, anything could happen, and at that time, he wouldn't have the ability to take care of her or bring her along. He decided to impact some wise survival skills. Only she would have to open the bag when in need of the instructions. At the moment, it didn't serve any value, but not when in need of help.

The cow was looking at him suspiciously from the side and he glared seriously at it, before it askesd, "What kind of survival skills do you have?"