Is Conclave Tribunal legal in Standard, Modern, and Commander?

Conclave Tribunal is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Conclave Tribunal?

Conclave Tribunal is an Enchantment. Its oracle text reads: "Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield."