Mindless Servant
From NsdWiki
This spell temporarily allows you to convert an object into a mindless servant. You can direct it at will to perform any manual action, even command it to uproot itself and walk away. The spell is effective on any object of the associated element.
It's a plantlike creature that permanently gains the blind, deaf, mindless, and unfeeling conditions. It uses your own statistics for skill checks, however the Size of the tree depends on the intensity. When the magic expires, the tree returns to its inanimate state. If you've commanded it to do anything to threaten its life (like uprooting itself and walking away), it will surely die thereafter.