Glamour

A glamour is form of enchantment that enables a witch/warlock to make themselves look like someone else in the eye of the beholder. It is unknown if this kind of spell counts as shapeshifting. Users of this spell should take care to avoid reflective surfaces such as mirrors, as they reveal one's true shape. Mary Collins used this enchantment to disguise herself as Lady Helen so that she could take her revenge on Uther Pendragon (The Dragon's Call). It is possible that Morgause used this enchantment to disguise herself as an old woman so that she could visit Morgana as her true form could be seen in a mirror (The Eye of the Phoenix).