This card grants the ability to play lands from the top of your library, mitigating the frustration of late-game land draws
Guess That Commander sharpen your meta knowledge between games
You can find my other precon upgrades here: Ahoy Mateys is a Blue / Black / Red Pirate deck: the goal of the deck is cast a bunch of pirates and go attacking, looting your opponents for treasure (Malcolm, Keen-Eyed Navigator), stealing their cards (Ramirez DePietro, Pillager), and even their permanents (Admiral Beckett Brass)
While my love for the card was high, the number of Allies in my Sakashima deck was not
Limit Break is the FFVII deck led by Cloud
These were met with lukewarm reviews as best, as the decks and their face planeswalkers tended to be underpowered and uninteresting