Overload

Overload is a potion made in Herblore, that is so strong that it racks the body with spasms and burns the digestive tract, so be prepared for 50 damage in chunks of 10 when you drink it! You will regain these 50 Hitpoints when the stat effects wear off. This Potion can only be made by the best and brightest Herblore players by mixing the five extreme potions and a grimy torstol. Overload can be made with 96 Herblore, giving the stat effects and magic boosts of ALL five of its potion ingredients - extreme attack, extreme strength, extreme defence, extreme magic and extreme ranging - for a period of five minutes. Unlike the other extreme potions, which gradually return your stats to their normal level, overload will keep these bonuses at their boosted level for five minutes and will then reset them back to their original state (healing the 50 Hitpoints at the same time). This potion can't be made using assistance.

Overload's 40% magic boost to offensive spells will stack with staves that boost magic damage.