More than a third of the time you activate Sorin, youre going to be going upstairs for four or more when you draw the extra card
You must ensure that your face-down spells and permanents can be easily differentiated from each other
So for Brago, King Eternal and decks like that, or guardian infinite combos, or even just to throw into Derevi for value, this is a neat ability
The Bracket System in Review Commander Brackets beta was something entirely new
More than 2 Cards: In very very rare cases, a card can get misaligned on 2 axis (horizontal and vertical) and get miscut in a way that shows more than 2 cards
In addition to that, whenever you deal combat damage to a player with one or more creatures, you get to exile that player's top card face down and cast it while it remains exiled