What's up with Jade Armors?

I tried to run to Grotto from Iron Mines and met with Jade Armors and Jade Bows for the first time. They killed my henchies like flies. I got hit and my hp is dropping. I tried to see what skill they used on me. Before I've read the skill description, Im dead. Tried a few times more but failed. What is the skill they usually use and how do I counter it? Or am I just too weak to stand their attack?

Spectral Agony: -100 life per second

The counter is to get infused at the Iron Mines of Moladune mission. Then you only take 9 damage per second.

its spectral agony, its like a -150 degen i think. you gotta get your armor infused by going to the seer at the iron mines of molodune(something similar to that).

edit: too late.

spectral agony.... its a true killer..... untill youre infused. once youre infused its a minor irritation at best. if youre not infused it gives you 20 health degen and 100 damage every second. once youre infused its 9 dmg a second, and i think less degen, not sure on that part though.

So I have to get infused. I thought that was only for Mursaats' attack. Thank you all for the replies.

Henchies should be infused :S

Jades are basically, Mursaat. And the henchies don't get infused till Thunderhead Keep, something Arenanet failed to do.

failed?

why should henchmen get infused before player characters?

Jades are the minions animated from stone that the Mursaat use as henchmen. They can cast it as well.

Note: You can also get infused by a seer in a cave at the very western end of the Mineral Springs area.

Really? o_O