Most powerful item in all of fiction

What is the most powerful item in all of fiction? Infinity Gauntlet? Cosmic Cube? Can the item destroy TOAA or the Presence?

That I know of - Shining Trapezohedron. From Lovecraft/Demonbane

And I don't think so.

Goku's insta button

@bluehope: I see your pencil and raise you:

Because it's permanent :)

It's so powerful it can even ruin friendships in real life.

Okama Gamesphere

HOTU

The Elder Wand and The Infinity Gauntlet.

@bluehope: Make pencil disapear in Joker TDKR haha nice!

Personaly I think Baturang

The Witching Cloak is pretty powerful, but no, it probably cannot defeat either of those beings.

As far as comic books go, the Heart of the Universe is the most powerful.