Spring of Serenity

Spring of Serenity enters the battlefield tapped.
At the beginning of each player's upkeep,
that player may search into his or her library
for a basic land card and put it into play tapped.
Then that player shuffles his or her library.
{t} Each player adds one mana of any color
and gains 2 life.
"A secret treasure, a blessing of Nature itself."