Here's an idea, spell cards that go in the extra deck.
>Current meta, complete with deck list
>Build and share casual decks
>Build and share cubes
>Proxy a deck or a cube for cheap
Your local chinaman (we're still researching this one)
Your printer + bulk cards + sleeves can also do the trick
>Library of in-demand alters
In a world of Uros and Omnaths, does losing to Infect feel unfair?