Moss Covered Library

Whenever a land enters the battlefield under your control, Gain 1 life.
Reclamation Squad {2}{g} - As long as you control
four or more creatures, you may pay {2}{g} and
exile Moss Covered Library, then cast it
transformed. Activate only as a sorcery.
A library located with in the expanding Arborial
Forest blends into its surroundings ...