Speaking of playsets, there's also one of the green Exodus staple, Survival of the Fittest (all English, GD, LP, PL, PL)
Once Oblivious Bookworm's ability begins to resolve, it's too late to put any permanents onto the battlefield face down under your control or turn any permanents face up to prevent yourself from having to discard a card if you choose to draw a card
You can even get extended-art versions of the modal double-faced cards in the set
Mewtwo-EX Next Destinies Pretty easy decision imo
Elminster Elminster is one of the few planeswalkers that can be your commander, and it gives Azorius a great, big-spells commander
During you Standby Phase: You can return 1 of your banished "Element" card to your Deck, then your opponent can discard one random card in your hand