Absolla Root

Absolla Root is a type of drug harvested from the massive Absolla tree of Yanth. This blood red root is part of the tree, and is found in the northern most areas of the planet's main continent where many render colonies thrive.

The tree is a deadly predator in its own right, with lashing vines and an insatiable appetite for any creatures that come near it.

Once ground into a thick paste Absolla Root has remarkable regenerative properties, and when applied to wounds it outright removes mundane forms of injury to the applied surface.

Source

 * Dark Heresy (2nd Edition): Enemies Without (RPG), pg. 100