Urza's Tower (Toppers) [Double Masters] XY146 When it enters the battlefield

When it enters the battlefield this way

"Let the song of Selesnya be heard above the rhythm of our thundering hordes

or abilities requiring an activation cost

and land cards revealed this way onto the battlefield

Set: Commander 2019 Type: Sorcery Rarity: Rare Cost: {7}{B}{B} Destroy all creatures you don't control and all planeswalkers you don't control

Urza's Tower (Toppers) [Double Masters] XY146 When it enters the battlefieldSet: Double Masters Type: Land Urza's Tower Rarity: Rare {T}: Add {C}. If you control an Urza's Mine and an Urza's Power Plant, add {C}{C}{C} instead. Urza studied the creations of the Thran not simply to learn from them, but to surpass them.