There used to be a dimension called Squadaland. I say used to because it imploded. Someone had planted a bomb using an inter-dimensional missile. One person escaped. That person swore revenge. He studied in other dimensions, learned the arts of magic, and destroyed the dimension that killed everyone he knew. He used the materials from their world to build himself a ship. He rebuilt his body with theirs.
He took on their evil. He kept destroying and absorbing. The chaos in his head grew.
And he was an it.
None are safe.