Guild Wars 2

Problem with completing chambers: We finish the first room of chamber, then get these electric things and big roots with electric in front of the door. How do i get by them? thank you!

Stand near the spiders and make them run to the door. They will enter the field that you need to enter.

Those electric things are actually portals. Well, one of them is a portal to the next area, while two of them will instantly down you.