Ra'ra'vis
From Tardis Wiki, the free Doctor Who reference
The Ra'ra'vis were the avian natives of the planet Helion.
Once each generation, the crystalline moons of Helion aligned with its sun at the Solstice of Pajaro. This created a time corridor that lasted for a few hours, which the Ra'ra'vis used to rejuvenate their old and sick. (COMIC: Time Fraud)
