Thread:Mediawatcher/@comment-25093933-20150315022442

Immortals is for those who can live forever but they can no longer be simply ageless be it invulnerability or regrneration. Some are by an item that keeps them alive that if it is destroyed either renders them mortal or kills them.

The Beast: As long as his lantern was kept lit he would live forever. That was the reason he turned his victiums into tress: to produce the oil to keep his lantern lit and himself alive.

Jasper: Like all Crystal Gems would live forever asking as her gem isn't destroyed. Any damage she received would heal when she entered said gem over a period of time. Combined with being self-sustainable and ageless is why I find her fitting of said category. 