Koorik
Koorik is a second level transmutation spell with an hour duration which requires concentration to maintain and a handful of tree bark to cast.
Koorik has an Estonian origin and is one of those spells which is more for fun than of any practical use. It gives the target’s skin the appearance of the tree bark which the castor holds. This would be useful for camouflage but for a few caveats. It cannot be cast upon the self and the castor must be touching the target and maintain contact for it to work. So, unless two people both use the spell on each other the illusion will be broken.