Maraline Forest

Maraline Forest enters the battlefeild tapped.
Whenever a creature enters the battlefield under
your control, you may gain 1 life.
{t}:Add one mana of any color to your mana pool.
The forests are bounded by ancient spells, kepping the
trees growing and the people out.
-The Ancient Book of Maraline, P#108 L#92-93