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When Plaza of Harmony enters the battlefield, if you control two or more Gates, you gain 3 life.
{T}: Add {C}.
{T}: Add one mana of any type that a Gate you control could produce.
Any additions to a Gate’s land types or abilities gained by a Gate can affect the types of mana a Gate can produce.
Plaza of Harmony checks the effects of all mana-producing abilities of Gates you control, but it doesn’t check their costs or legality. For example, it doesn’t check whether a Gate is untapped.
The types of mana are white, blue, black, red, green, and colorless.
