Your ancestors were native to the Feywild, so you are considered a fey creature for the purpose of effects that relate to creature origin.
You have a choice of either the cloud of darkness or darkfire power.
Rather than sleep, drow enter a meditative state known as trance. You need to spend 4 hours in this state to gain the same benefits other races gain from taking a 6-hour extended rest. While in a trance, you are fully aware of your surroundings and notice approaching enemies and other events as normal.
+2 Intimidate, +2 Stealth, +2 Dexterity, +2 Charisma, Darkvision
This class feature functions as the rogue class feature, except that you can deal the extra damage only when you hit with a rogue power or a rogue paragon path power.
Eldritch Pact (Hybrid): Sorcerer-King
This class feature functions as the warlock class feature, except that you don’t gain the at-will attack power or the Pact Boon granted by it. This means you meet prerequisites that require the pact you choose, and you can use the benefits tailored for it in certain powers.
Warlock's Curse (Hybrid)
This class feature functions as the warlock class feature, except that you can deal the extra damage only when you hit a cursed enemy with a warlock power or a warlock paragon path power.
Rogue: +1 Reflex
Warlock: +1 Reflex or Will
Cunning Sneak (Hybrid)
You don’t take a penalty to Stealth checks for moving more than 2 squares, and you take a –5 penalty instead of a -10 penalty to Stealth checks for running.
Shadow Walk (Hybrid)
On your turn, if you move at least 3 squares away from where you started your turn, you gain concealment until the end of your next turn.
You gain a hybrid talent option for one of your hybrid class entries. (Shadow Walk)
You gain a hybrid talent option for one of your hybrid class entries. (Cunning Sneak)