Lesser Focused Agility Potion
Potion
Potion
Increases XP gain for the Agility skill.
Lesser Focused Agility Potion in the journal
You might be mistaken in thinking that an agility potion will make you an overnight athlete. The potion is still working with the body you have: there are no dramatic physiological changes. For physiological changes, you might want a trip to Dr Fenkenstrain.
An elder gentleman with dodgy hips will shuffle faster - and will likely experience incredible pain as they do so - but won't be able to perform backflips.
How to craft Lesser Focused Agility Potion in Runescape Dragonwilds
Lesser Focused Agility Potion
Brewing Cauldron