Many thanks to wild-kid and Sky Egret for their tips. Jiaoshou was deeply grateful.
A faint smile appeared on Rex's face as he watched his gold increase once again. Had Kael'thas been there to see what Rex was doing, he would surely have called him shameless. Of course, that was only a fanciful thought. Given Kael'thas's temperament, at most his gaze would have turned cold and mild anger would have shown on his face. A man of his refinement would never have resorted to insults.
What did you do when you were short of money? Earn more, of course. But Rex needed an enormous sum of gold. Conventional ways of earning money would take time, and time was precisely what he lacked most. So he had done one thing: sold the blueprints for the Arcane Tower. Selling them to Kael'thas was a sale, and selling them to someone else was still a sale. Either way, he was selling them, and Rex felt no guilt whatsoever. His only regret was that this second sale had come at a discount, fetching far less than the first sale to Kael'thas.
Still, the Dalaran Council had handed over a considerable amount of gold. Who said Gilneas's isolationist policy had achieved nothing? At least the outside world knew little about Gilneas, allowing Rex to spin whatever tales he pleased without worrying about being exposed. With the sale of the Arcane Tower blueprints to Dalaran complete, he had accomplished his purpose in coming here. After one more visit to Lordaeron, he could return to Gilneas.
He had originally intended to visit Karazhan as well, but the reports from there told him that it had already fallen into ruin. An evil power filled the place, preventing the scouts from venturing deep inside. Rex therefore abandoned his plan