Guild Wars 2

I just tried to get Chaos Treatment, sat in the middle of SB and died 2 times.
Got screenshot of being hit by Chaos Rift damage and from SB as well.

Still didn’t get my achievement

From GW2WIKI :

Acquisition

Stand in the Shadow Behemoth’s Chaos Rift in Queensdale with your Raven Egg to prepare it for the chaos of the Mists.

Note: The chaos rift is the spot where the Shadow Behemoth’s body meets the ground – not one of the green portals that appears around it.

Silly question, but did you have the egg in your inventory at the time?

Sariel V.7024:

Silly question, but did you have the egg in your inventory at the time?

Not silly at all ! It actually worked !

Looks like the one in the achievement collection isn’t working, so you need to get a second raven egg.

Thank you

That still sounds like a bug, but I’m glad it worked out for you I would think the original should do the job. Unless the original collection item didn’t give you a matching trophy in your inventory.