Kamata

is the false identity of the , the Category King of Hearts Undead who transforms into before being defeated by Decade. 
==History==
===World of Ryuki===
The Paradoxa Undead was brought into the World of Ryuki by Narutaki and assumed the guise of of sub-chief editor of the Atashi Journal. He appeared to support Tsukasa and company in their investigation the scene of chief editor Reiko Momoi's murder to clear Natsumi Hikari, helping provide whatever info he could before he and Tsukasa are summoned to join the Kamen Rider Trial in the Mirror World.
When Imperer interferes in the fight, Abyss decides to take advantage of this turn of events to see Decade's abilities, overseeing the later fight between Decade and Knight before attempting to take them and Ryuki out. But once Ren acquires the Time Vent from Odin, Shinji uses it so he and Tsukasa can stop Reiko's murder, learning that Kamata is the culprit, using his Undead powers to kill Reiko. After being defeated by Decade and Ryuki, with his deck shattered, Kamata's true nature as an Undead is revealed by Narutaki who takes him back to his home: Blade's World.
====World of Blade====
Kamata returns to the World of Blade where he works with Hajime in a plot to take over the world as the chairman of the BOARD Corporation. Kamata arrives and attacks them as the Paradoxa Undead. As Decade battles the Paradoxa Undead with the Capricorn Undead backing him up, Kazuma becomes Blade and fights Garren and Leangle. However, both fights are interrupted with the appearance of Kamen Rider Chalice, who takes the Blay Buckle off of Kazuma and takes out the other Riders before fighting Decade one-on-one.
Decade continues his fight with Chalice, with Garren losing his Garren Buckle in the process. The fight comes to a sudden halt when Kamen Rider Todoroki shows up. Back at BOARD, Hishigata is demoted to Rank 3 while Kazuma is fired from BOARD,later Kazuma and Yusuke arrive too late to save Hishigata and Mutsuki as Hajime uses the created card from the Rider Systems to become the Joker, revealing his reasons to Kazuma. Decade arrives as Ryuki with the Blay Buckle and gives Kazuma the resolve to fight back. Once Kazuma becomes Blade, he and Decade destroy the two Undead together. 
====World of the Rider War====
In the World of the Rider War, a copy of the Paradoxa Undead was created by Super Apollogeist by combining Undead. This Paradoxa Undead is destroyed by Kiva. 
===OOO, Den-O, All Riders: Let's Go Kamen Riders===
A mishap caused by the Greeed Ankh unintentionally altered the timeline which enabled Shocker to utilize the Core Medal to create the Shocker Greeed which defeated the Double Riders and seemingly erased the legacy of the Kamen Riders from history. In 2011, after Kamen Rider New Den-O's attempt to repair the damage, he along with Kamen Rider OOO and M-Ankh awaited execution. However, it was revealed the Double Riders had their brainwashing removed by a Shocker scientist,Paradoxa Undead and other monsters and Kamen Riders come back,later he is seen among Tiger Orphnoch fighting Decade.
===Kamen Rider Wizard===
====The Kamen Rider Rings====
The Paradoxa Undead and Capricorn Undead's fight Decade (as seen in Welcome to the Blade Restaurant) was shown in a recollection by Amadum as he explained the nature of his world as a paradise for monsters destroyed by the Kamen Riders. The Paradoxa Undead also appears in the world within the Magic Stone proper. 
====Neverending Story====
It was among the monsters whom were destroyed by a combination of Blade's Lightning Slash, OOO's OOO Bash and Agito's Rider Kick. 
==Video Game appearances==
===Kamen Rider Battle Ganbaride===
Kamen Rider Abyss appears as a playable character in this video game Kamen Rider Battle Ganbaride.
===Kamen Rider Riderbout===
Kamen Rider Abyss and Paradoxa Undead appears as a playable character with the other Heisei and Showa kamen Riders in Kamen Rider Riderbout.
CHINIABBYS.jpg|Abyss as seen in Kamen Rider Riderbout
ChibiParadoxaundead.jpg|Paradoxa Undead as seen in Kamen Rider Riderbout
===Kamen Rider Break Joker===
Kamen Rider Abyss appears as a playable character with other Riders and monsters in Kamen Rider Break Joker.
===Kamen Rider Buttobasoul===
Kamen Rider Abyss is a playable character in Kamen Rider Buttobasoul.
===Masked Rider Expansion===
Kamen Rider Abyss is a playable character in this trading card game with other Showa and Heisei Era Kamen Rider, Super Sentai, Metal Heroes and other Heroes.
==Forms==
==Equipment==
*Advent Deck - Transformation device and Advent Card holder
*V Buckle - Transformation belt
*Advent Cards - Trinkets that enable a Rider to summon Contract Monsters, access equipment, and use special abilities
*Abyssvisor - Abyss's Visor that enables him to use Advent Cards
===Contract Monsters===
*Abysslasher
*Abysshammer
*Abyssodon
===Cards===
==Behind the Scenes==
===Portrayal===
Kamata is portrayed by . As Kamen Rider Abyss, his suit actor was , who later became the suit actor for Kamen Rider Diend.
===Concept Art===
Paradoxa Undead was designed by .
Kamen Rider Abyss Concept Art.jpg|Kamen Rider Abyss concept art
Paradoxa Undead concept art.jpg|Paradoxa Undead concept art
==Notes==
*In the music video for "Journey through the Decade", Gackt summons the Paradoxa Undead to fight Tsukasa. Gackt is also seen using the same killing technique used by Kamata against Tsukasa.
*The Paradoxa Undead was one of several Undead costumes were used in a cameo in the OOO portion of Movie War Mega Max, where they were used to depict the obscured future monsters which attacked humanity in 2068.
*Although the Paradoxa Undead suit is never seen in Kamen Rider Blade, its Category-King Ace Rouse Card was often used by Hajime Aikawa for his Wild Chalice form. 
*Although Abysshammer and Abysslasher appear in Kamen Rider Ryuki as Contract Monsters, Kamen Rider Abyss himself is exclusive to Decade and does not exist in Ryuki, and by extension Kamen Rider Dragon Knight. Abyss would later appear as one of the Rider Fight candidates in Rider Time: Kamen Rider Ryuki, under a new user.
==Appearances==
==External Link==
* in Kamen Rider Official Website.
*kamen rider Abyss in Kamen Rider Official Website.
*Paradoxa Undead in Kamen Rider Official Website.
==Navigation==
Category:Decade Characters
Category:Kamen Rider Decade
Category:Kamen Riders
Category:Villains
Category:Decade Riders
Category:Non-human Riders
Category:Undeads
Category:Heisei Era Riders
Category:Mantis Monsters
Category:Card Riders
Category:Deceased
Category:Generals
Category:Dark Riders