Supreme attack potion

The supreme attack potion is a six-dose combination potion that can be made at level 93 Herblore after buying the recipe for 500,000 coins from Lady Meilyr (you do not need to find this recipe in Daemonheim). It is made by combining a super attack (4) and an extreme attack (4) in a crystal flask, giving 240 experience.

A dose of supreme attack boosts Attack by 16% of your Attack level, plus 4, rounded down; this provides an additional 2 levels over extreme attack at level 99 for a final level of 118.