Erhnam Djinn [Arabian Nights] Magic 2011 Promos You may spend blue mana

You may spend blue mana as though it were mana of any color to pay the activation costs of Quicksilver Elemental's abilities

(If it has X in its mana cost

Set: Urza's Saga Type: Enchantment Rarity: Rare Cost: {G} You may play an additional land on each of your turns

Schools meet and mingle on Lorwyn's riverways

Exploit (When this creature enters the battlefield

Erhnam Djinn [Arabian Nights] Magic 2011 Promos You may spend blue manaSet: Arabian Nights Type: Creature Djinn Rarity: Rare Cost: {3}{G} At the beginning of your upkeep, target non Wall creature an opponent controls gains forestwalk until your next upkeep. (It can't be blocked as long as defending player controls a Forest.)