Disenchant is cast on a location, causing a large area effect spell to occur.
The effect will cancel any magic that is currently within the area,
usually 'enchantment' magic that has been 'attached' to a creature or wizard."
You can't - other than recasting the enchantment spell that was removed.
However, by virtue of the spell ingredient sharing.,
an enemy wizard with disenchant can't have
both of which are
So an enemy with disenchant is slightly more susceptable to dragon attack.
alternative spell choices
Disenchant is completely unique.
The spell ingredient
can produce the spells:
Disenchant is the nemisis of gorgon's stare,
and can be useful to have if your opponent's tactics relies heavily on
And while the knight is a useful
killer, NOTHING kills a dragon like gorgon stare, the spell of choice here