I like to keep some unaltered precons around for when I play more casually, and Limit Break is the perfect candidate for this
Theres a cute thing that can be done by playing this at the end of a players turn, but once that happens, the player is locked out of their own draw phase the following turn
Thats actually kind of cute
Earthcraft is the best source of mana to fuel a number of infinite combos involving Doubling Season, Cathars Crusade, The Meathook Massacre, and Corpse Knight, among others, but these cards only scratch the surface of your combo potential with this commander, so if thats your preferred style of play, the linked primer above is going to be your best starting point for deck construction
Choosing which cards to apply an effect on is always part of the effect itself