You can only fight them in the WoB, right?

I never knew there was a Tiamat in this game. Now I understand some of you are split on weather it's a rumor or not, but I remember the old man who mentions something about getting rid of the dragon on the Veldt. I forget if he says that in the WoB or WoR though.

I'm curious to know if he can provide a Rage, or if you can steal something good off of him. I read the other thread where someone said he drops an economizer, which would be nice before going to the floating continent.