An overload (+) is a potion that boosts all the player's combat stats by 6 + 16%, while damaging them for 50 hitpoints. This boost is repeated every 15 seconds for five minutes until the effects wear off, and the player is then healed 50 hitpoints.
It can only be made in Chambers of Xeric with 90 Herblore by using a noxifer with an elder (+), twisted (+), and kodai (+). Making this potion gives 66.5 herblore experience.
This potion is the strongest variant of the overload potions, and cannot be taken out of the Chambers of Xeric.