Revolving Wilds

{t}: Add {c} to your mana pool.
{t}, Sacrifice Revolving Wilds: Name a basic land card, then flip a coin. If heads, search your library for the named basic land and put it onto the battlefield tapped. If tails, search your library for a basic land other than the named card and put it into your hand. Then shuffle your library.
We are forever at the mercy of nature's whims.