It can help enable landfall by making creatures like Wood Elves and Topiary Stomper get extra lands into play
Choosing the right card size will depend on which style or kind of card you want to have, although cards that are made out of either thick cardboard or vinyl are the best ones out there on the market
Panharmonicon will double all triggers from creatures entering
Its so good, in fact, that its one of the small number of precons including the MH3 ones, and some Final Fantasy ones, that have the honor of being not really a Bracket 2 deck, and closer to Bracket 3 out of the box. Other lands decks like Lord Windgrace focus on using fogs and build slow value, or going for combo like The Gitrog Monster
Rather than try to win the game as quickly as possible, a control deck will want to slow down the pace of the game while it accumulates incremental advantages each turn