“The Monstrosity”
From Jenny Everywhere Wiki
“The Monstrosity” was a murderous eldritch creature with a single great human eye and a number of tentacles of various shapes and textures. It began to cross over from its universe into Reality Z-25 31-H through Doctor Brain's Portal, and killed Brain's assistant, but was banished back to its homeworld when Captain Evening deactivated the portal. (COMIC: Tales To Behold)
