Wondrous Item

Very Rare Requires attunement by a bipedal creature missing both legs Requires Attunement

When attuning to this set of legs, they attach themselves at the hip and can not be removed against the user's will until their attunement ends. The sprinter legs are fully functional body parts. When inside an area without magic, they function like regular prosthetics.

Enhanced Stability Package: The user's movement is unaffected by difficult terrain and their speed can not be reduced in any way. When barefoot, the user's footsteps produce no noise, granting advantage on Dexterity (Stealth) checks that rely on moving silently.
Speedware: As a bonus action, the user can double their walking speed and all opportunity attacks made against them have disadvantage. The user can end this effect as a bonus action. If this property has been used for a total of 10 minutes in one day, it ceases to function until the user finishes a long rest.
Long Fall System: When falling, the user can spend a reaction to reduce fall damage taken by 5 times their level.

The flesh is weak, but steel is strong and eternal.

So shed your weakness and become pure.

Become one with the immortal machine.