Hey Dude,
Okay here is what u have, as i can remember. What u have to do is have a eng lvl at least 225. You can not learn the deathray, it has to be accessed at one of the terminals deep inside Gnomemoregan. You have to get the quest in org, at the eng's to get a quest to bb, where u go to the lil fella next to the transporter thing. He will give you a transporter. Then, find your self a group, youll need it no matter how highyou are. While there you have to find a drop called the delta key. Its not spellbound so u may find it in AH..once u have that key u must use it to access the terminals near the final boss all the wayt at the bottom. the terminals are these lil box onthe ground, that look like computer, dont wry, you cursor will go gear when you go over it. Then access the terminal with the DELTA Key..and it will say, if youo would like to access the terminal schematics. Now i believe you lvl has to be 225, but from what i can remember from you post, ur high enuff. Once u get it theres you deathray. I have seenit hit other for 1000 hp, it also can do damage to you aswell, or sometime not work at all. But i say that it fires 90 percent of the time. My character name is Equatch on Hellscream Horde. If you dont want to find it, then i can make one for you if youd like.
Godspeed. I also have a delta key that id ont use anymore, so u can have that aswell. Its not a rare drop, but if you kille enuff off the low lvl guys youll find it at one point.
I hope this helps.
Piece