Alter Aeon Online Help

Keywords are:  'druid tonic defoliate defoilate'

The 'defoliate' tonic is typically emptied into an area in bulk
and used to strip leaves from trees and plants.  In heavily wooded
areas, this can allow casters sufficient view of the sky to cast
weather spells. It prevents certain spells from working, such
as entangling roots and storm of roses.

This tonic can also be bottled and used offensively against plant
based creatures.  It is extremely effective against other druid plant
spells, such as entangling roots and vampiric vines.