Dark Sun - Destiny and sacrifice
Ancient life-shaped graft
These ropey strands have a mottled gray skin, smooth and slick like oiled leather. It surrounds a stiff but flexible core.
At each end is a circular mouth surrounded by teeth, like a leech. They are usually found in pairs.
When attached into the muscles of the legs near the joints, it gives the user the ability to jump as much as 5 times the host’s height and as much as 10 times the normal distance.
These things are alive, requiring only minimal amounts of nutrition it gets from being attached to its host.