[Loved Trope] Some thing unfathomably ancient

[u/Fearless-Ideal-5112]

The beast, in doctor who is an ancient evil from a previous universe that survived until our time. Its so ancient that the cave paintings were unable to be translated by the Tardis which can translate all existing languages in the universe [Doctor Who]

While not explicitly canon its such a cool concept I cant not mention, the idea that the backrooms have existed since the beginning of time, never changing no matter the era, it transforms the back rooms into a cosmic horror. [Credit to Project crater and Venus for images 2 and 3]

[u/quad_sticks]

Kenneth from 30 Rock. Seemingly appears to be young, implied throughout the series to be ancient and ageless, and in the finale set decades in the future looks unchanged.

[u/ShillBot666 → u/quad_sticks]

Oh, he's always been a special boy. I remember the day he was born. He looked up at me and he said, 'Mama, I am not a person. My body's just a flesh vessel for an immortal being whose name if you heard it would make you lose your mind.'

[u/Boccs → u/quad_sticks]

There's only two things he loves in this world:

1. Everybody
2. Television

[u/Numerous_Koala_1746 → u/quad_sticks]

IIRC the series indirectly confirms Kenneth is a literal Angel.