Song Xingchen explained that the creator of Cave Vision was a Song family ancestor who was both a constable and miracle doctor.

An unexpected opportunity led him to the realization that even after the death of the Siberian tiger, its eyes still burned with intimidation that could frighten a whole pack of wolves. He wondered if he could reproduce this effect in human beings.

So he stimulated his eyes with drugs and acupuncture, but unfortunately failed and ended up blind.

Uncontent with his failure, the old man tried again with his month-old son, washing his eyes every day with his own concoction. Finally, he created Cave Vision by mistake, allowing the user to see perfectly in the dark or observe the most minute details. The initial formula was very dangerous, especially with the...