Inspiring Dance reads, "Whenever this character quests, ready all cards in your inkwell." This couldn't be better for players looking to draw a large number of cards and power out a litany of characters and actions in a single turn
Then at level 3, you get to bring back a noncreature, nonland permanent from your graveyard back to the battlefield
(Sometimes even for free!) Collective Nightmare will probably only be useful as a sideboard option in the younger formats, but Pile On has potential to reach some older formats like Modern
Said work does, however, represent some of the very best the game, or any game, has to offer
Until end of turn, your life total can't change, and permanents you control gain hexproof and indestructible