Targeting a 5-foot square on the ground that you can see within range, you cause a tree to sprout from the ground, growing rapidly to 20 feet tall with a 2-foot-radius trunk. This spell can only target a surface through with a tree could grow (for example, you can't target solid rock). At the DM's discretion, it can burst through up to 6 inches of most material.
A Large or smaller creature in this space must make a Dexterity saving throw. On a failure, they are lifted 20 feet into the air in the branches of the tree. On a success, they move 5 feet to an occupied space of their choice (if there is no space they can move, they automatically fail). A Large or smaller creature can choose to fail their saving throw. A Huge or large creature automatically succeeds on their save. The tree stops growing if it would hit a ceiling or other object when growing.
The tree provides as half cover to any creature within its branches, and three-quarters cover from effects originating on the other side of its trunk. The tree has an AC 13 and 50 hit points.
The tree remains there, but may die rapidly if sprouted in an unsuitable location or environment. Its wood is flammable only when dried, and serves no useful purpose other than firewood.