Forest? Forest! (World Event Idea)
Here's one for you DM's that want a forest in your campaign but forgot to put one in. The player's are in a town near a tree when the tree starts to glow. After awhile the tree will begin to vibrate as well. About 5 minutes after that the ground will start to get small tremors which will grow over time. After about an hour of this, the earth under the ground begins to rise & on that ground is a somewhat ethereal looking forest. After about 30 minutes of rising it will stop. About one to three day later the forest will stop having an ethereal look & begin to look like a regular forest. About a week later the forest will start having animals come into it.