Sewage

As amazing as the Source Crystal was, Shi Tian was starting to wonder if Isaac got into some trouble because of this particular item.

Additionally, a question came to his mind.

Why was this Source Crystal left behind?

If he was being chased, he would have stored this item no matter what. 

The only possibility of leaving such a valuable item behind was that the enemy came in very unexpectedly and there was no time left. 

However, that possibility was hard to believe, considering how Isaac managed to activate the self-destruction function on most of the robots. 

'This is really starting to give me a headache.' Shi Tian knitted his brows, feeling overwhelmed by the countless "if" situations. 

The truth was, even he was left in shambles by the abrupt escape, and it was only now that he had the opportunity to ponder over.