So I'm a Spider so What? Vol. 5 (manga)

You think you can beat me?! You and what army!? Oh. . that army. . I thought I was getting the hang of things! Famous last words, right? This middle stratum is filled with fiery magma (with monsters to match!), but I''ve been holding my own. I may be a weak, little spider, but I''ve got brains on my side--three of them, in fact! I''ve got Information Brain to call the shots, Body Brain to do the moves, and my new Magic Brain to figure out. . whatever the heck is up with magic in this world, sheesh. Think you can take on me, myself, and I, Mr. Big Giant Scary Dragon?!!