My idea for a 'monster': An enormous ethereal being made out of geometric fractal formations. It's has a seemingly endless number of tentacles that appear to grow in size indefinitely (like a fractal set). The ends of these tentacles are smaller than subatomic particles and they grow to sizes that dwarf the distance across the observable universe, which alludes to the unimaginable overall size of this entity (a size which spans countless universes). It exists in 'hyperspace' as it is a higher dimensional creature, and swallows entire universes whole, casting them into oblivion. I'm sorry that would probably be very difficult to sketch. . .