Celestial surgebox (reward)

The celestial surgebox was a Dungeoneering reward item that was held in the shield slot. It required 70 Magic, 70 Runecrafting and 70 Dungeoneering to equip, as well as 65,000 Dungeoneering reward tokens to purchase. The celestial surgebox could be charged with certain runes used in wave or surge spells, namely air runes and blood runes for wave spells, or air runes, blood runes and death runes for surge spells. Runes within the surgebox could be used alongside other runes or rune-supplying items such as elemental staves to cast wave or surge spells, depending on which setting the box is set to. The rune-saving ability of the staff of light did work to save a charge on the surgebox. To charge the box in wave mode, 5 air runes and 1 blood rune was needed for each charge; in surge mode, 7 air runes, 1 death rune and 1 blood rune was needed for each charge. It could be charged with as many casts as desired.

Every fifth spell cast from the celestial surgebox would score a "critical hit" and dealt 25% extra damage in a separate hitsplat. The counter to the critical hit cast reset only if next spell was not cast in immediate succession. For example, eating a piece of food would reset the counter as it delayed your next combat action, while doing something that did not cause a delay, such as moving or drinking a potion, would not reset the counter provided the next spell is cast immediately. The counter could be carried from one enemy to another if there was no delay. Damage from the extra hit was subject to the same modifiers as regular damage, such as the bonus from ferocious rings or casting fire spells on ice strykewyrms. Note that if you missed in one of your casts, the critical hit ability would then be moved onto the sixth cast and so on.

The Celestial surgebox did not activate the tank ring's damage reduction effect.

It was removed following the Evolution of Combat.