This means you can easily play several songs in a row with Powerline in play , especially if you are lucky enough to have both Powerline and Max Goof on the table at once
Essentially, if you have a full party with all four of these on the board, you can pay one white, one blue, and one black mana to give the Warrior lifelink, deathtouch, and make him unblockable (deathtouch and unblockable at the same time has no real use, but thats still OP to think about)
For the third Mystical Archive card in the Collector Booster, it will always be a traditional foil uncommon Mystical Archive card
Thats his newspaper profits
Then you reveal the top ten cards of your library, and put one into your hand for each type
It has sometimes been compared to the best card in Magic Ancestral Recall