Ethereals on the other hand are more concerned with profit than Goblins. They'll gladly stand and fight you to keep their profits, or to kill you and take and sell whatever you might have on you. They're raiders and thieves who trade, not business men. Not to mention they have their own pride and commitments they'll gladly fight for. When you show up in Mana Tombs and start killing Nexus-Prince Shaffar's forces, he doesn't grab his loot and run, he takes it as a personal offense and meets you head on to make you pay for what you've done.