Double Cross
{3}{B}{B}
Sorcery
Choose another player. Look at that player's hand and choose a card other than a basic land card from it. They discard that card. At the beginning of the first upkeep in your next game with that player, look at that player's hand and choose a card other than a basic land card from it. They discard that card.
Double Play
{3}{G}{G}
Sorcery
Choose another player. Search your library for a basic land card, put it onto the battlefield, then shuffle. At the beginning of the first upkeep in your next game with that player, search your library for a basic land card, put it onto the battlefield, then shuffle.