Dreamroot Cascade (Promo Pack) [Innistrad: Crimson Vow Promos] Gate Set: Commander Masters Type: Legendary

Set: Commander Masters Type: Legendary Creature — Elder Dinosaur Rarity: Rare Cost: {6}{W}{W} The sky takes flight and the earth trembles

Set: Doctor Who Type: Artifact Rarity: Uncommon Cost: {2} {T}: Add {C}

where X is the number of basic land types among lands you control

Or just look up a calculator online

They are the Defenders of Humanity

Dreamroot Cascade (Promo Pack) [Innistrad: Crimson Vow Promos] Gate Set: Commander Masters Type: LegendarySet: Innistrad: Crimson Vow Promos Type: Land Rarity: Rare Dreamroot Cascade enters the battlefield tapped unless you control two or more other lands. {T}: Add {G} or {U}. Soothing whispers invite travelers to step closer, closer, closer . . . until they vanish soundlessly beneath the surface.