Sailor Moon Vol 8

From the Kodansha edition

Sailor Moon must unite every guardian in the solar system in order to confront Chibi-Usa's sickly friend Hotaru, who is actually Sailor Saturn, Deity of Destruction, as well as being possessed by Master Pharoah 90. Plus, a mystical unicorn asks for help during a lunar eclipse, an elaborate ship floats through the sky, and Usagi and Chibi-Usa have an argument.

Source: OpenLibrary