Egg

The tunnel was so small that if he had to enter it, then he would have to crawl into it. However, there is some risk by entering into it carelessly in the search of a treasure. 

So, he wanted to check whether it is safe to enter into it or not.

'Swoosh'

While he was checking the small tunnel, the dead body of the spirit fox turned into the specks of small light dots making Henrick a little surprised.

'Why did it turn into the light dots?'

Henrick thought for a moment before coming to a conclusion, 'This must be not a real beast.'

A real beast would not disperse like that and when he recalled he was inside a treasure land, he felt his guess was right.

'Swoosh'

The small light dots from the three-tailed spirit fox flew into the tunnel making Henrick a little curious.

'I will follow these light spots in the dark tunnel,'