For decks with three or more colors, where you might only be able to afford a small number of MDFCs since you'll need most of your lands to either be basics (for ramping / tutoring purposes) or tap for multiple colors of mana, the best MDFCs are Bala Ged Recovery (seriously, if you have green mana in your deck, play this card), Valakut Awakening, Hagra Mauling, and Ondu Inversion, along with the mythic cycle, which is almost always good if you can afford another land that only taps for a single color of mana
Demand has been a lot higher than anticipated, and resellers seem to be out in full force
It has been optimized with valid replacements for the Historic Brawl format, so you can enjoy this deck tech even in digital play
Deck Construction Decks consist of 100 cards, with no more than one copy of any card except basic lands in a Commander deck