How to Obtain
Legendary weapons can be obtained at huge events, all those who participated have a chance of obtaining one. If people can't decide who will take the weapon, then a new event will be opened of claiming a weapon.
It will be a simple 1v1 fight tournament. Best role-player gets the weapon, and not the winner of tournament. But winning one, grants you extra % of obtaining it.
Whats the difference between other weapons
Legendary Weapons spend less stamina, than a regular weapon would spend at that kind of damage.
And they usually give stat bonuses.
Stats
Inhiber Mace - Appearance - 40 Damage, 6 stamina cost, +20 Health.
Violette Sword - Appearance - 30 Damage, 4 stamina cost, +15 Energy.