Teenage Mutant Ninja Turtles / Usagi Yojimbo: WhereWhen #4

Lord Noriyuki's army recuperates from a fight with the Mogura Ninja clan. Meanwhile, General Usagi, the TMNT, and the Neko Ninja clan encounter dangerous clockwork spiders as they near Dr. WhereWhen's fortress! But are the mechanical foes the only ones prowling the forest?