Let there be light!

At the beginning of the video, I do kill about 20 Petrified with light. Then I try other stuff for steam achievements, so you can fast forward until 11:00 minutes where I do kill another 20 ish. It's hard to count them. If it's not enough, you can fast forward all the way until 2h45m30s where I do kill another 20 Petrified