How to obtain:
- Mother Brain - Drop.
A terribly powerful punching arm.
Translation: Tera-power Arm
Latin for Earth or land, the moniker of this weapon may imply that Robo is not only fighting for, but empowered by the planet.
Since it is one of Robo's strongest weapons, it is possible that it is instead a misspelling of tera, which means "trillion". Compare to Terrasaur, which is a relative of Megasaur and Gigasaur, which have SI prefixes in their names.
From: Weapons (Chrono Trigger)