Magical Staff

A magical staff is an object which sorcerers use to perform magic, enhance their magical abilities and even use as a weapon. Like general spells, these sorts of magical instruments are use to channel one's magic, focusing it on the object of the enchantment. They are usually sources of magical strength, too.

All the Sidhe possess Sidhe staffs that they use to cast bolts of magical energy or perform the different spells of Sidhe magic. Even when a Sidhe is banished from Avalon, he cast still keep his staff, along with his magical powers. Gifted human sorcerers can harness these staffs' powers to their own.

Anhora, keeper of the unicorn, also possessed a staff, however he was never seen using it for magic. (The Labyrinth of Gedref)

Morgana used the Rowan staff which was carved from the Rowan Tree on the Isle of the Blessed so that she would raise an army of skeletons. The staff's power was powerful enough to guide its user so that they would not have to chant a spell and only the High Priestesses and their Blood Guard had set eyes on it (The Tears of Uther Pendragon).

The Cailleach owned a magical staff, too. She may have used it to control The Veil between the Spirit World and this world, closing or opening it at her command. Anyway, she was seen using it against Gwaine, casting a Stunning Spell with it (The Darkest Hour).

Alator of the Catha also possessed a magical staff. Being him a warrior and a priest, his staff could also be some kind of weapon. He used it a source of magical power to blast Morgana against a wall, defending Merlin (The Secret Sharer).

In Morgana's vision, Emrys was seen walking with a long, white staff, that could have been magical (The Darkest Hour).