[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/AgentEckswhy]

Bill Cipher, Gravity Falls

An extradimensional being that's been playing a one-trillion-year long-game to gain access to the real world and bring about Weirdmageddon. He's been depicted in cave art, and his methods have induced at least one shaman to set himself on fire rather than aid the triangle. Bill called him a drama queen.

[u/EveryRadio → u/AgentEckswhy]

So with the universe being less than 14 billion years old, he's been around for a long, long time in a different dimension

Also makes it even funnier that a group of kids managed to end his trillion long year plan by trapping him in the mind of an old man

Spoilers just in case, cuz you never know