Exotic Orchard

The colors of mana are white, blue, black, red, and green. Exotic Orchard can't be tapped for colorless mana, even if a land an opponent controls could produce colorless mana.

Lands that produce mana based only on what other lands "could produce" won't help each other unless some other land allows one of them to actually produce some type of mana. For example, if you control an Exotic Orchard and your opponent controls an Exotic Orchard and a Reflecting Pool, none of those lands would produce mana if their mana abilities were activated. On the other hand, if you control a Forest and an Exotic Orchard, and your opponent controls an Exotic Orchard and a Reflecting Pool, then each of those lands can be tapped to produce green mana . Your opponent's Exotic Orchard can produce green mana because you control a Forest. Your Exotic Orchard and your opponent's Reflecting Pool can each produce green mana because your opponent's Exotic Orchard can produce green mana .

When determining what colors of mana your opponents' lands could produce, Exotic Orchard takes into account any applicable replacement effects that would apply to those lands' mana abilities (such as Contamination's effect, for example). If there are more than one, consider them in any possible order.