Mosswort Bridge [Commander 2015]

Rarity: Rare Hideaway 4 (When this land enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
Mosswort Bridge enters the battlefield tapped.
T : Add G.
G , T : You may play the exiled card without paying its mana cost if creatures you control have total power 10 or greater.