If an opponent controls more lands than you, search your library for up to three Plains cards, reveal them, put them into your hand, then shuffle
I don't like the inconsistency of relying on big ramp and I don't think the payoff is worth it with these kinds of cards
Magic: The Gathering's largely popular Commander format comes with a unique deckbuilding restriction, only allowing a player to include cards in their deck that are within their chosen's commander's color identity
Leader cards can use an effect while outside of the main battle, before later being deployed - flipping the card over to reveal new abilities - by paying their cost to join an arena as a unit card
There are plenty of ways to play the actual card game, too
You may be running four copies of [c]Mystical Dispute[/c] in your sideboard, but if nobody in your local tournament scene plays blue decks, whats the point