"<Caster> has proclaimed that the oak growing in <his/her/it's> sacred grove is the Mother Oak, the oak that stands at the heart of this world.
The possession of this oak is surely a sign that <caster's pretender> is the rightful ruler of this world, thus the oak must be burned."
Alteration 5, N5, 50 Nature Gems.
The Mother Oak increases the caster's nature gem income by 10. It is one of the earliest possible globals.