Mr. Spider is a character prominently featured in episode 81 of The Magnus Archives. In the episode, Mr. Spider is primarily depicted indirectly through a storybook that tells a tale of him forcing a family to feed themselves to him one by one, but is revealed at the end of the episode to be a real creature.

As his source material is audio-only, Mr. Spider has no canonical appearance, so accurate tagging may have to depend on word of the artist.