Dominaria

Kamahl's Druidic Vow | Legendary Sorcery | | (You may cast a legendary sorcery only if you control a legendary creature or planeswalker.) Look at the top X cards of your library. You may put any number of land and/or legendary permanent cards with mana value X or less from among them onto the battlefield. Put the rest into your graveyard. | Noah Bradley

Sylvan Awakening | Sorcery | | Until your next turn, all lands you control become 2/2 Elemental creatures with reach, indestructible, and haste. They're still lands. | Adam Paquette