|This article is about a/an changer in Tensou Sentai Goseiger.|
The Gosei Power Invocation Device Tensouder (ゴセイパワー解放器テンソウダー Gosei Pawā Kaihōki Tensōdā) is a transformation device that the Goseigers used in the Tensou Sentai Goseiger series. It is voice activated by inserting the Gosei Cards to the device, saying "Gotcha" when open, then the card's ability when closed. It can also summon various items when they use the Gosei Cards. In order to tell the device to work, they must say, "Tensou!" The Tensouder is voiced by Ikuya Sawaki, who also voices the series' narrator and the team's mentor, Master Head.
At the climax of the Legend War, the Tensouders as transformation devices were made redundant when the Goseigers sacrificed their powers with the rest of the first 34 Super Sentai to destroy the invasion force of the Space Empire Zangyack. Resurfacing as Ranger Keys, the Goseiger powers would be used by the Gokaigers to assume their forms via the Gokai Change. Although the Goseigers recovered their Ranger Keys from the Gokaigers, they decided that all the powers should remain in the same place for the time being and returned them. Ultimately, the Gokaigers returned their borrowed powers to their rightful owners after overthrowing Zangyack.
The Goseigers call "Change Card, Tensou!" when to transform. Once the Change card inserted, the Tensouder snaps shut while saying, "Change, Goseiger!" and the transformation begins.