Drows were a subset of the small population of elves living in the Goblin World. Dark violet-skinned with beautiful white hair, they were the only elves to worship the Moon. Their Wood Elves brethren honoured the Woods as an entity providing them with shelter and a safe home whereas the Golden Elves devoted themselves to the Sun.
Kraft was elated since he hit the jackpot with them. They would make ideal underground members simply through their reputation alone. Rumours had it that all Drows were 'evil' incarnate of the otherwise highly esteemed elves. He himself was aware that all these were just stereotypes used to scare unruly kids into bed and could empathise with the ostracisation they had to suffer from. Unfortunately, after a lie got repeated long enough, it had a way to become a 'truth' in itself.