>>10255853Depends on the size of the moc, I'm not sure how big the octopus is compared to an actual minifig but just try. Surpringly, there are not many Cthulhu mocs that uses the octopus
Pic related has free instructions so at least you can have an idea.
https://rebrickable.com/mocs/MOC-54378/SpaceGlove/star-spawn-of-cthulhu/#details