Blow the Whistle allows him to shut down opponent actions until the start of the player's next turn, potentially neutralizing powerful songs and more
Crystals The full colored cycle of Crystals reduce costs, and each one has a static ability and an activated ability, so the 4 mana value slot is a key one to launch you into the the biggest and strongest cards, and rely on 2-mana rocks to curve into these on turn 3
Its fair to say that without Restoration Angel, Thragtusk might never have been so popular
Let me process this for you while you gaze at each new thing about it that is wrong on some level
However I did draw a hard line around cards which primarily serve to mill your entire deck into your graveyard in one go: Hermit Druid, Cephalid Illusionist, Balustrade Spy, and so on
And if you pay 5, which is tough at sorcery speed, you can tutor and then draw the card plus two more