Zetsuen no Tempest Wiki
Zetsuen no Tempest - Yoshino with the Magu.jpeg
Vital statistics
Type Magic Item
Effects Instant Communication
Users Kusaribe Clan
Manga Debut Chapter 1
Anime Debut Episode 1

Magu are wooden objects filled with magic used by the Kusaribe Clan. They are shown to be used for communication purposes, and can be used by non-mages by putting a nail inside of the Magu (as shown by Mahiro Fuwa). It has also been shown to be able to communicate across time as well.