Gigandeath

Whenever an Imagin is defeated, they sometimes reform their bodies along with a berserk state of mind, warping into one of three types of massive creatures called Gigandeath (ギガンデス). The number of Gigandeaths emerging from an Imagin can be from a single Gigandeath, to two different types, to an entire army of them. These monsters are mindless and are filled by the urge of destroy. Whenever a Gigandeath emerges, only a Time Train can take it out. All three Gigandeaths are augmented into the Nega DenLiner's arsenal.

Heaven


An aerial Gigandeath, Heaven resembles a bird with elements of a bat and a wasp.
 * Gigandeath Heaven (ギガンデスヘブン)
 * Stats
 * Appearances: 2, 14, 22, 34, & Kamen Rider Den-O & Kiva The Movie: Climax Deka
 * Myth/legend: Ziz

Hades
An aquatic Gigandeath, the eel-like Hades combines the elements of various sea creatures and is able to fly.
 * Gigandeath Hades (ギガンデスハデス)
 * Stats
 * Appearances: Episodes 6, 14, & Kamen Rider Den-O & Kiva The Movie: Climax Deka
 * Myth/legend: Leviathan

Hell
A terrestrial Gigandeath, Hell combines the elements of an ox, an elephant, and a large cat. It possesses great speed and a thick hide.
 * Gigandeath Hell (ギガンデスヘル)
 * Stats
 * Appearances: Episodes 10, 22, 34, & Kamen Rider Den-O & Kiva The Movie: Climax Deka
 * Myth/legend: Behemoth