Eldrian was curious about the warlock and luck parts, but he didn't want to know more about interspecies relations. Just thinking of someone trying to get a dragon pregnant; yeah, no. He didn't want to dig into that topic.
While the warlocks' magic was a foul thing, Eldrian could discuss it with a smile. Turns out, most warlocks turned into devils or mindless demons. Their magic required playing with souls, and this was always a dangerous game. Mixing in the bloodlines of races was reckless. Naturally, it more often than not led to death or the losing of their sanity.
Yet, for power, many continued the path in hopes of the slight chance of success. Though, most who followed the path of warlocks died in the previous invasion. Causing the profession to turn to dust with the turning of time. Now, the only places to find a warlock would be within the devils' ranks.