Gaia Forest can be cast four times in a game.
Gaia Forest is similar to Thor's Dwarven Mine, except it creates wood instead of gold. Each use of the power creates 20 aspen trees, and each tree contains 200 wood (instead of the usual 150 wood), plus Citizens gather from these special trees (called Gaia Forest Trees) just under 15% faster than ordinary trees.
Gaia Forest is also useful as a barrier to keep enemy troops from entering an area. Early in the game it provides a nice boost in wood and later on it can provide a source when most of the threes are chopped down. Prior to the release of the Extended Edition, Gaia Forest Trees could not be targeted by the Walking Woods god power, but have always been susceptible to Forest Fires.
- If Gaia Forest Trees are targeted by Walking Woods, they turn into Walking Oaks.