Not So Heroic
Potion of Elasticity
This potion appears viscous and gooey.
A character consuming a dose of this potion is able to stretch her legs, arms, neck, or any other appendage an additional distance in feet equal to her Constitution score. Whenever she stretches, she must make a Constitution check. On a failure, the stress of the stretch causes 1d6 hit points of damage. The potion lasts for an encounter; during this time, the imbiber may make as many stretches as she wishes, as long as she checks for damage with each stretch.