He is not "immortal" He can still get sick, get wounded, & possibly perish.
But he is unfathomably old
He may be a "youthful" matured man to his people
But to Earth Folk. He is so old its unmeasurable

He is the only one left on this planet. As its acting Guardian.

A planet full of old alien relics & ruins
Extreme plant overgrowth
This lone creature is "the guardian"
His mind seems to be connected to everything here

Some alien technology of sorts
Hes able to control anything of these relics on this world

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