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Keywords are:  'enchant legendary artificer'

Skill: artificer enchant        Lvl 37  Any  (21%)
                                (helpful)   Requires: enchant essence
                                Group: Ritual enchant skills
                                Profession
Skill: legendary enchant        Lvl 40  Any  (21%)
                                (helpful)   Requires: enchant essence
                                Group: Ritual enchant skills
                                Profession

Usage:
enchant <object> artifice
enchant <object> legendary

The 'artificer enchant' skill is one that encompasses a broad range
of artisan and crafting techniques designed to maximize the efficacy
of a skillfully constructed piece of equipment.  It allows a character
to raise the level of the enchanted item.  Single level equipment is
raised by one level, while total level equipment is raised by two to
four levels, to a maximum of the enchanter's level.  Total level
equipment cannot be raised beyond 172 total levels.

The 'legendary enchant' skill is an ancient and powerful ritual that
infuses a portion of your soul into the enchanted object.  It causes a
piece of equipment to be bound and personalized to your character's
levels, adding class flags if your character is the maximum level in
that class.  As the enchantments are inextricably intertwined with your
character's essence and legacy, equipment so bound can never be unbound.

Both of these enchantments can raise the maximum potential of further
enchants and reforges for an item.

Enchantments such as these are taxing on the enchanter's body, draining
his mana, movement, and, in case of legendary enchants, health.  Each
such enchant also costs a practice.  These enchantments are permanent
and have a high cost of gold.