Exploration [Urza's Saga] Junior Super Series the player can activate mana

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

(They can't be blocked except by artifact creatures and/or black creatures

If it's a land card

Set: Urza's Saga Type: Sorcery Rarity: Rare Cost: {R} Search your library for a card

Set: Magic 2014 Type: Instant Rarity: Rare Cost: {W} Your opponents can't cast spells this turn

Exploration [Urza's Saga] Junior Super Series the player can activate manaSet: Urza's Saga Type: Enchantment Rarity: Rare Cost: {G} You may play an additional land on each of your turns. The first explorers found Argoth a storehouse of natural wealthtowering forests grown over rich veins of ore.