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
Speaking of playsets, there's also one of the green Exodus staple, Survival of the Fittest (all English, GD, LP, PL, PL)
You can even get extended-art versions of the modal double-faced cards in the set
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
If youre planning a Pokmon-themed bash for a teen, an adult, or even a joint birthday party, you can tweak the designs to fit the vibe