I disagree with a bunch of the ratings. Shadow Sorcerer is A+ material, I know people are obsessed with the Hexdip, but as a whole Shadow Sorceror is arguably one of the most powerful subclasses in the game, even with the weaknesses of the base class.
Every feature is pure gold, none suck, Darkvision 120' and the Darkness spell that you can see thru, an ability that keeps you from dying, a hounds that gets buffed with temp hps, gives the target disadvantage on saving throws against you spells, can know tagets prone, and can autosense its targets location even if invisible, etc..., at will teleportation of 120', and a power that gives resistance to everything except raidiant and force, allows you to move through objects.