|This article is about a/an episode in Tensou Sentai Goseiger.|
|Epic 17: A New Enemy! The Spectral Demon Beasts|
|Tensou Sentai Goseiger, Episode 34x17|
|Air date June 6, 2010|
|Written by Naruhisa Arakawa|
|Directed by Hiroyuki Kato|
Epic 16: Dynamic Alata
Epic 18: The Earth Purifying Knight of Destiny
A New Enemy! The Spectral Demon Beasts is the seventeenth episode of Tensou Sentai Goseiger. It is the debut of the Earth Condemnation Group Yuumajuu, the second enemy army of the series, as well as the debut of the Goseigers' Sixth hero, Gosei Knight.
Two days after Warstar has been finally defeated, the Gosei Angels follow Alata when he senses an evil presence. This leads them back to the area where he recently defeated Dereputa and they find footprints and an a hole. They are then contacted by Datas of weird occurrences in the city; several people have been dissolved into piles of sludge by a strange slime. Among the victims is the Prime Minister. As the Landick siblings follow the tunnel, Hyde analyzes the slime for Datas while the Skick Angels watch the news of mysterious deaths and realize a pattern. Once contacted by the Landick siblings and Hyde confirming the sludge remains would harm the planet, the Gosei Angels set up a trap to confront the monster responsible: Tomarezu of the Tsuchinoko who is a member of the Earth Condemnation Group Yuumajuu. The group's leaders, Makuin of the Blob and Kinggon of the Bigfoot, appear and explain that they were sealed away ten millennia ago before being released back into the world to once more turn it into a poisoned world. While Gosei Blue battles Tomarezu, the Landick siblings fight Kinggon and the Skick Gosei Angels deal with Makuin, but none of them are able to hurt their opponents as the powers of the Yuumajuu have been enhanced by today's pollution. Tomarezu manages to spray the Goseigers with his slime as Datas comes to their aid.
Overpowered by the Yuumajuu, it seems hopeless for the Goseigers when a new figure joins the fight: Gosei Knight. While Gosei Knight destroys Tomarezu, restoring his victims to normal, the reinvigorated Goseigers battle Makuin and Kinggon before the two Yuumajuu escape. After Tomarezu revives as giant vehicle, Gosei Knight turns himself into the Groundion Headder as he becomes Groundion and destroys the Yuumajuu. After assuming his usual form, Gosei Knight leaves the Gosei Angels without a word to their shock. In their base, Makuin and Kinggon wonder why Tomarezu was able to enlarge until they are joined by the one responsible: their old ally Buredoran.
- The opening credits are updated to include Gosei Knight.
- This episode marks the beginning of the Yuumajuu arc.