Game of Thrones: Melisandre's Chain

Collar of Vigourous Servitude
This Valyrian Steel collar surmounted by a large ruby eye is an artefact of considerable power.
Minor Artefact of Energy
Power (100pp)
Wish (specific): reduce the wearer's age fifty years from ancient to mature for as long as the collar is worn prolonging the wearer's life, even against exposure to poisons.

Handicaps and Penalties

• The collar must recharge regularly or become powerless. To do this the living of royal blood must be sacrificed in fire.
• The jewel will go clear and disolve if desecrated by exposure to water and the artefact become ineffective. Consequently it will be nothing more than a collar of valyrian steel as other such collars have done in the past and the wearer instantly assume their true age.