Crystal Desert quests?

I have a lvl 20 ele/mes and quite a long time ago when he was lvl 17 or 18, I got stuck!
I was in the crystal desert storyline and i spent ages trying to get to that snake guy, i cant renember the species name, i think he's calles Sariss something(i'll check wiki soon).
I THINK that i finally got to him after getting past all of those annoying fire ele hydras and im pretty sure that ive got to a bit where there are 3 places to go to gain ascension, one is thirst river, only one i can remember.
Problem is that that was ages ago and ive done quite a lot with that character(got to level 20, gone to cantha and elona, explored kryta) and a lot on my other chars encluding making new ones.
Also there are no crystal desert quests in the log...
I remember spending some time ages ago trying to find out what to do and getting nowhere!
I wanna finish the campaign(if I can!) so that i can do hard mode and do some other things i wanna do(starting with prophecies) like killing Rotscale,(what drops do you get for killing him) and get the explorer titles.
HELP ME!
PLEEEEEEEAAAAAAAAASE!

You have to find all 3 mission outpost to complete them and then go to the 4th one that is in the middle after which you need to go to the portal in the oupost go through the arcth thing step on 3 stones let them light up and then see the wall come donw after which you will fight your clone.

http://wiki.guildwars.com/wiki/The_Forgotten_Ones
After obtaining the quest from Annelle Fipps in Destiny's Gorge
Seek out Sariss Yassith in Skyward Reach.

(EDIT, nevermind you need to do the 3 missions first) http://wiki.guildwars.com/wiki/Crystal_Desert

Rotscale (and sometimes the other dragons) will drop Rotwing Recurve Bow. (skin also available as end reward from Nightfall).

Thanx, ill do that stuff tomorrow or perhaps the next day when i have time.
Is that all he drops cos the only ranger i have is level 1 lol!

Wrong section, post in Q&A in the future.