What is your Favorite #6 Leyline

In Magic 2011 and Guildpact there was a rare cycle of enchantments. These enchantments have 3 things in common. First, the name is always Leyline of Something. Second, they all cost 2 any color mana and 2 mana of their color. Third, if you have one in your opening hand you may put it into play before the game starts. I think that this is very creative and like it a lot. Remember to comment and tell us what your favorite Leyline is.