Suddenly your Leyline Bindings are answering two permanents, your evoke Elementals become super-charged double triggering when they enter the battlefield, your Fable of the Mirror-Breaker is making double the Goblin tokens, and this isnt even considering the possibility of actually building around Elesh Norn in some sort of ETB heavy Soulherder or Ephemerate blink shell
after all, it's just an Archivist of Oghma you're happy to play on turn 2 or turn 8
(2018-07-13) The artifact remains tapped when you gain control of it
Store the cards in a cool, dry place
In the right deck its a more impactful Gray Merchant of Asphodel, giving you some reach and helping you close the game through board stalls
Compared to the more aggressive red decks, you are less about being able to go to their face with the burn spells, but dealing with creatures like Thing in the Ice and Ledger Shredder seems important, and you have a high enough concentration of creatures you can target it with