Armadyl battlestaff

The Armadyl battlestaff is a two-handed Magic staff that requires 77 Magic to wield. It is created by attaching an orb of armadyl to a regular battlestaff, which requires 77 Crafting and grants 150 Crafting experience. It is currently the strongest non-degradable staff in the game. It provides protection against the Armadyl followers in God Wars Dungeon.

In addition to providing the fourth-best hit bonus of all staves, behind the chaotic staff, Zuriel's staff, and noxious staff (all of which degrade), the Armadyl battlestaff acts as a staff of air, in that it provides unlimited air runes when wielded. This allows players to cast air spells, such as Air Surge and Divine Storm, for free, as well as reducing the cost of all other standard elemental spells and Smoke spells. This potentially makes the Armadyl battlestaff a superior choice for common combat activities such as Slayer training. Since it is non-degrading and provides unlimited air runes, it allows powerful and free casts that pose a significant threat, even to rangers.

Wielding the staff also buffs auto-attacks with the Storm of Armadyl spell by 10%, but does not increase damage with abilities. With the release of legacy, the armadyl battlestaff was given a special attack "Tempest of Armadyl" requiring at least 50% adrenaline (special attack while in Legacy mode).

Unlike most other battlestaves, the Armadyl battlestaff cannot be enchanted into a mystic version by Thormac; nor can a Shade skull be added to make a skeletal or necromancer's version.

Special Attack
The Armadyl battlestaff has a special attack called Tempest of Armadyl. It consumes 50% adrenaline for each use. Four attacks are launched in quick succession against the opponent, each hitting for up to roughly 150% spell damage. When used at 100% adrenaline (allowing two uses) a total of 8 attacks can be made in a very short period of time, dealing very large amounts of damage.

With at least 80% adrenaline, one could use Asphyxiate, Wild Magic and the special attack consecutively, which would result in a large damage output.

The damage dealt by this special attack will be increased while under the effects of Sunshine and Metamorphosis ultimate abilities, making the special attack extremely potent. It is possible to hit up to 900% spell damage per special attack doing this.

Trivia

 * The staff had been fluctuating in price after the Evolution of Combat, finally resting at a higher price after glacors were buffed, rendering them harder to kill.
 * Despite the fact that Storm of Armadyl, the companion spell to the Armadyl battlestaff, requires completion of Ritual of the Mahjarrat to cast, the staff does not require completion of the quest to wield.
 * Prior to the Evolution of Combat, the Armadyl battlestaff increased the casting speed of Storm of Armadyl from 3 seconds to 2.4 seconds. This made it one of only two ways to cast spells faster than the standard rate, the other being the Blitzer class of a ring of kinship. However, the latter was a randomly occurring effect (unless the ring was fully upgraded) and only available in Daemonheim.
 * While any combat aura is activated, the cosmetic effect does not fit the staff much like with Korasi's sword.
 * In the motion comic 'The Origins of Gielinor' Zamorak impales Zaros with the Armadyl Battlestaff not the Staff of Armadyl. Mod Osborne said this was his mistake.