"Once you take hold of me, what will you do?"
- ―Beliarok asking when a user holds it for the first time.
The Beliarok (ベリアロク Beriaroku) is a sword with an arm guard themed after Ultraman Belial's head. It is capable of speech and intelligent thought. He is currently held in Ultraman Z's possession, although said weapon is only accessible through Delta Rise Claw.
Subtitle: Phantom World Sword (幻界魔剣 Genkai Maken)
When Ultraman Geed was absorbed into Greeza, he had hoped to obtain the needle but his efforts failed as the Ultra was slowly absorbed into nothingness. However, the needle had pricked Geed prior, and a drop of blood with the Belial Factor resonated with the needle, transforming it into a sword with Belial's features. After using the Z Riser to pierce through Greeza, Z managed to claim the device, but as it was given sentience, the Beliarok initially refused to cooperate until it was given a formal introduction and reason to fight. Once Haruki Natsukawa gave his proper introduction, the sword complied and proceeded to help Z destroy the monster.
During a fight against an Alien Barossa, Z was disarmed of the Beliarok, just as the alien had hoped for. Upon being reached by the alien, Beliarok asked what it would do if it was wielded. Hearing that the alien would use it to plunder the treasures of the universe, Beliarok consented to be wielded, but quickly found the Alien Barossa's attacks to be quite boring and refused to continue to be wielded by it. Shrinking down to a human's size, Beliarok was reached again by Jugglus Juggler. Hearing that Juggler wandered on an aimless journey, Beliarok initially wasn't interested, but gave its consent upon hearing that there was someone Juggler wanted to cut with the Beliarok. Watching the ensuing fight between Z and Barossa, Juggler noted that Z was taking a beating, only for Beliarok to observe that an overconfident fighter would leave an opening, and Z was waiting for that opening. Once Z took his chance, Beliarok left Juggler, saying that Haruki seemed like he would be more interesting to travel with. Once again asking Haruki what he would do, hearing Haruki admit that he wasn't sure caused Beliarok to tell Haruki that he was extremely green, but that simply meant he might eventually grow enough to cut something interesting. Granting its consent, the Beliarok once again allowed Z to wield it, but departed afterwards, declaring that it would slice what it wanted, whenever it wanted.
During the battle against Alien Barossa III and Jugglus Juggler as Tri-King (and later, Five King), Yoko Nakashima found the Beliarok on the ground while piloting Sevenger, after Z had dropped it while fighting Tri-King, as Beliarok stubbornly weighted himself down after Haruki told him he had fought Five King once before. As Yoko attempted to have Sevenger pick up the Beliarok, the sentient weapon introduced himself, but refused to fight. However, with a little convincing and reverse psychology from Yoko, Beliarok allowed himself to be wielded by Sevenger, the machine becoming his third user. Beliarok proved crucial in defeating Alien Barossa III alongside Sevenger and King Joe STORAGE Custom's Leg Carrier, forming one third of Sevenger's improvised Sevenger Wave-Riding Special Slash which the machine used to put Barossa III down for good.
- Reversal: The Beliarok can swallow an enemy's attack before redirecting it back at them.
- Energy Slash: Z can unleash a purple energy slash from the Beliarok.
- Eye Beam: A beam fired from the Beliarok's eyes. It can be used to attack or temporarily split two fused beings.
- Deathcium Slash (デスシウムスラッシュ Desushiumu Surasshu): Pressing the button thrice, Z slashes a "Z" through the opponent's body with the Beliarok.
- Another variation has Z trace a "Z" in the air, then thrust the sword to generate an energy drill with which he impales the opponent.
- A third variation is a slashing energy wave from the sword, powerful enough to split an alien from its host and tear open a dimensional rift.
- Deathcium Fang (デスシウムファング Desushiumu Fangu): Pressing the button twice, an apparition of Belial's head chomps down on the opponent.
- Deathcium Claw (デスシウムクロー Desushiumu Kurō): Pressing the button once, Z impales the Beliarok into the ground. It summons two giant claws to form a binding ring of energy. It can be used for offensive means like using the energy claws to stab the opponent multiple times.
- Final Break (ファイナルブレイク Fainaru Bureiku): Energy projectiles launched by Alien Barossa.
- Sevenger Wave-Riding Special Slash (セブンガー波乗りスペシャルスラッシュ Sebungā Naminori Supesharu Surasshu): A three-way combination attack with Sevenger and King Joe STORAGE Custom. Sevenger rides on top of King Joe STORAGE Custom's Leg Carrier and is propelled at speed towards the target. Once in range, Sevenger delivers a heavy slash from the Beliarok, critically damaging the opponent.
- Density Manipulation: The Beliarok can manipulate his own density to his own liking. This is usually done to defy his wielders and preventing an outside force from using him without his own permission.
- Electric Shock: From his head, the Beliarok can unleash a small bolt of electricity. Although it does not harm the user, its sole intent is to prevent anyone from touching it without the sword's own permission.
- Flight: The Beliarok is capable of anti gravity flight.
- Size Change: Beliarok's default form is a smaller weapon shaped like an oversized dagger. Should anyone was given the permission to wield him, he will change his size into a combat-oriented form, either in human size or a giant to be wield by an Ultraman-sized figure.
- Self-repair: Beliarok can somehow repair itself after destruction, and claims to be "immortal".
|Sluggers||Eye Slugger | Vezard | Maxium Sword | Zero Sluggers | Xlugger | Geed Slugger | R/B Slugger|
|Bracers and Bracelets||Ultra Bracelet | Ultra Converter | King Bracelet | Stratos Edge | Armed Nexus | Armed Mephisto | Max Spark | Max Galaxy | Mebius Brace | Knight Brace | Ultra Zero Bracelet | Strium Brace | Ultra Fusion Brace | Taiga Spark | Plasma Zero-let|
|Melee||Ace Blade | Ultimate Blade | Leo Nunchaku | Giga Battle Nizer | Ginga Spark Lance | Knight Timbre | Orb Slugger Lance | Orb Calibur | Orb Slasher | Geed Claw | King Sword | Giga Finalizer | Orb Dark Calibur | Orb Ring NEO | R/B Kourin | Taiga Tri Blade | Z Riser | Z Lance Arrow | Beliarok | Circle Arms|
|Armors||Protectors | Cosmo Tector | Grantector | Arb Gear | Tector Gear | Ultimate Aegis | Zero Slugger Gear | Cyber Armor|
|Others||Ultra Array | Ultra Magic Ray | Ultra Mantle | Ultlance|