Guild Pact
Instant
Choose two colors. Add a mana of each of the chosen colors. At the beginning of your next upkeep, pay one mana of each of the chosen colors. If you don't, you lose the game.
colorlessNot legal in Commander
Instant
Choose two colors. Add a mana of each of the chosen colors. At the beginning of your next upkeep, pay one mana of each of the chosen colors. If you don't, you lose the game.
colorlessNot legal in Commander