When Plaza of Harmony enters, 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.
[+1]: You gain 2 life and draw a card. [–1]: Tap target creature. It doesn't untap during its controller's next untap step. [–9]: Tap all permanents target opponent controls. That player skips their next untap step.