I love using things like Raven Familiar or Grand Archivist to fetch/cast Luna's Pocket Galaxy, and now we have Lorekeeper Polkelt to move it to the top of the deck! This requires having nothing else that costs 7, so the deck has to be all 6-cost cards and below. I decided to opt for a very copy-heavy strategy, with the full suite of Archmage Arugal, Duplicate, Potion of Illusion, Echo of Medivh, and even a Manic Soulcaster plus the standard Zola the Gorgon and Barista Lynchen to generate lots of extra value. If you want, you can replace Astromancer Solarian with Dirty Rat or something else, as Solarian Prime unfortunately does cost 7 rather than 6. All in all, it's just another way to have fun with lots of 1-cost legendaries!