Drow elves, like their surface dwelling cousins, are very magical in their nature. The difference between the two lay in the fact that Drow elves left the surface world for a subterranean existence. Drow tend to dabble more in the "dark" arts of magic, and are evil in their nature. Some Drow however are outcasts, and have decided to venture out to the surface.
Drow elves are extremely good spellcasters, and are resistant to magic as well. They are a lot weaker than humans physically, but compensate with a greater intelligence. Drow are not as hardy as most races, but are more dexterous than most as well.
Drow have developed the ability to see in the dark, to sneak up on their foes, and can hide from them equally well. Drow cannot stand direct sunlight, and feel excruciating pain when sunlight hits their skin. During this time they cannot heal any damage they have sustained or recharge their magical energies.