Type VII

A type VII or K7 civilization would travel, transcend and ultimately oversee or be the Omniverse which is the collection of every single universe, multiverse, megaverse, paraverse, 11d dimension and 1st realm (reality). Everything is in the Omniverse, and there is only one Omniverse.

It is likely that such power would come from an individual rather than a civilization, as the civilization would have transcended and merged into a single mind that would encompass all thoughts and all timelines, thus being omnipotent, omnipresent, and omniscient. This is the Creator: a god above all gods, responsible for all of existence, past and future.

Detail
Energy usage: Infinite

Existence is in 11d (experiments with 11+d) and 1r (reality) (awareness of 2r)

Sub-Type
See also:

Type VIII

Civilizations that are considered Type VII
The One-Above-All from Marvel

The Presence from DC

Eru from Lord of the Rings (it is possible that Eru is from the outerverse and therefore at least Type X)

Many scps and all groups of interest from the scpverse have the possibility of being type 7+ due to the theoretical capabilities of scp anomalies

Azathoth from Lovecraft (Type still to be determined)