Randomization is something that works favorably in the case of new collectors establishing a good base without the need to have encyclopedic information on sets that need to be targeted
Terra, Magical Adept / Esper Terra At 3 mana, Terra, Magical Adept is a nasty early setup piece: It mills five on entry and can even snag an enchantment you milled straight into your hand
A lot of the new mythic rare cards and rare cards have abilities that could well be game-ending in a short amount of time
What makes shroud so cool from a design perspective is how much added value it can give a creature beyond combat stats
Even better, Wan Shi Tong can actually end games via combat, something blue decks full of card draw can sometimes struggle to do
You dont have to cast it if you dont want to, and you dont lose it if you choose not to cast it for a turn or two