A king was father to the Chosen One, and nurtured the light that would shine upon all creations. This was his mighty sword. It makes the great greater.
Sword of the Father (父王の剣, Chichi-ō no Ken?, lit. Sword of the Father King) is King Regis's sword in the Final Fantasy XV Universe. It is a royal arm, only able to be brandished by the line of Lucian kings. It is an elaborately decorated sword that has a wing-ornament on one side of the hilt.
King Regis uses the sword as his iconic weapon, the same way his son Noctis Lucis Caelum becomes associated with the Engine Blade, gifted to him on his sixteenth birthday. When General Glauca and the forces of Niflheim attacked Tenebrae where Regis and Noctis were visiting, Regis fended off Glauca's attack on him with the Sword of the Father before their escape back to Insomnia. Needing to maintain the Wall around Insomnia drains Regis of his life-force, however, and he has become frail and has stopped wielding the sword.
When the Crown City is attacked by Niflheim, Regis summons weapons to his side, but is ultimately killed by Glauca after he passes on the Ring of the Lucii so it may end in the hands of its rightful owner: Noctis. Ravus Nox Fleuret, the former prince of Tenebrae with grudge against Lucis and Regis, takes Regis's sword from his corpse. He cannot brandish it as he is not of the Lucian bloodline, but nevertheless keeps the sword by his side and people begin commenting on him carrying it. Ravus claims the late king gifted him with the glaive as a gesture of goodwill before the signing, denying he took it as a spoil of war.
Ravus serves Niflheim as a high commander, but in time is convinced by his sister to help Noctis to become the Chosen King. When Noctis learns Ravus has been seen with the sword, he feels ambivalent but believes he will be able to reclaim it from him. Ravus had written letters to Lunafreya where he had told her Noctis is not worthy of either her sacrifice or King Regis's sword, but that if Noctis proves himself worthy by obtaining Leviathan's blessing he would gladly bequeath it. When Noctis takes on Leviathan's trial, Lunafreya calls upon the spirits of the old kings to empower him and Noctis temporarily gains the power of all the royal arms, including the Sword of the Father. After losing the Armiger, he no longer has it.
Noctis infiltrates the imperial capital to salvage Lucis's stolen Crystal so he may save the world from daemons. He finds his powers have been sealed and that he cannot summon his weapons to his side, and goes through the imperial magitek laboratory with the Ring of the Lucii as his only means of offense. He comes across Ravus's dead body and reclaims the Sword of the Father from him. Recognizing its rightful wielder, the sword glows when Noctis grasps its hilt. Noctis learns Ravus had been safekeeping the sword for him from the letters that are scattered about his body.
At last you have arrived, Noctis. The gods have shown you their favor. As blood of the Oracle, I present you your father's glaive. Now go forth, my king. Shine your light onto the world.
Ravus had been betrayed by Ardyn Izunia who had assumed the form of Noctis. Ravus had tried to bestow the Sword of the Father to him, but Ardyn had cut his prosthetic arm down with his own Sword of the Father and left him with the sword with Ravus's arm and the letters he had sent to Lunafreya for the real Noctis to find. Before his death, Ravus had fought the daemons the emperor had ushered upon him with the Sword of the Father, despite it having been reported earlier that he cannot brandish it. This may be the reason he lost, or his newfound loyalty to Noctis may have had the sword accept him allowing him to wield it.
Noctis clears the rest of the laboratory wielding the sword, and turns off the device that was sealing his magic. He finds the Crystal but is absorbed inside it, and the world is taken over by the Starscourge and daemons. Noctis reawakens ten years later and returns to the ruins of Insomnia to fulfill the prophecy of the True King. He fights his way to the Citadel, where his heretical ancestor, Ardyn, who has become the embodiment of the powers of darkness, ushers the resurrected and daemonic Ifrit at him. When Bahamut stalls Ifrit with his colossal swords, Noctis summons the Sword of the Father to cleave off one of Ifrit's horns.
When Noctis faces Ardyn in a battle of kings, both wield the full set of royal arms, including the Sword of the Father. Noctis finishes Ardyn with an attack from each of his royal arms, and delivers the final blow with the Sword of the Father. Victorious, Noctis sits on the throne of Lucis and calls upon its past kings who attack him one by one while Noctis grips onto the Sword of the Father. As Noctis's soul is taken by the Ring of the Lucii, he enters the realm beyond where he and the past kings' spirits erase Ardyn's soul and banish darkness from the world.
In an alternate ending where Ravus doesn't die, he presents the sword to Noctis at the steps of the Citadel as he returns.
The sword is obtained during Chapter 13 of Final Fantasy XV in the Zegnautus Keep. For a time it is the player's only melee weapon. As a royal arm, it drains Noctis's HP when used as a normal weapon. After the player regains the rest of their weapons, the Sword of the Father is also used as part of Armiger. When the player performs the last stage of Armiger Chain the thirteenth and final attack is Noctis using the Sword of the Father. It also features prominently in Armiger Unleashed, Noctis even dual-wielding it with the Engine Blade in Armiger Vortex.
When the player loads their "game cleared" save and enters Chapter 15, Noctis will be equipped with the Sword of the Father as his only weapon by default.
Sword of the Father briefly increases its wielder's strength after finishers. Attacking with it performs basic sword slashes, one of them leaving a hologram that damages enemies that come into contact with it like with Trident of the Oracle. The last attack is a slow, but powerful and gives +200 Strength for 5 seconds. The finisher can be used to put enemies in Vulnerable state and then attack them with the boosted Strength. It is possible to skip to the finisher (works with any weapon) by starting a combo, pausing, and during the flourish where Noctis returns the weapon press attack again. With the Sword of the Father, the player won't skip right into the finisher, but into the thrust right before it.
Its aerial combo is same as with normal swords, and moving closer to an enemy to attack in a "mini warp" doesn't cost MP when attacking with it. Its phase counter is a stab. Warp-striking with it leaves behind a damaging hologram and consumes less health than warp-striking with other royal arms.
Noctis's Play Arts Kai figure comes with his Engine Blade and the Sword of the Father. The figure included in the Ultimate Collector's Edition doesn't have the same weapons as the regular version.
- An artwork of Noctis holding the Sword of the Father is an Easter egg in Assassin's Creed Origins. This is because of Square Enix and Ubisoft's collaboration between Final Fantasy XV and Assassin's Creed: Origins that resulted in Final Fantasy XV: Assassin's Festival.
- Sword of the Father is the weakest royal arm.
- In the second part of the Leviathan battle, Noctis wields every royal arm, including the ones he hasn't obtained yet. If a player can execute a complete combo, Noctis will finish using the same attack pattern he uses when finishing a combo with the Sword of the Father, which at this point should be in Ravus's possession.
- At what point Ardyn obtained the sword is unclear. He doesn't use it in Final Fantasy XV: Episode Ignis Verse 2, but uses the other royal arms (as well as a scythe), implying he didn't have the Sword of the Father yet. He uses it to kill Ravus when posing as Noctis, but whether this was the real Sword of the Father or part of the illusion is unknown. Ardyn has the Sword of the Father in his Armiger in the final battle. His version of the sword is red, rather than platinum as wielded by Noctis and Regis.
- The Windows and Royal Editions have a boss battle against the Mystic, whom Noctis finishes off with a sword that he doesn't normally have: it has a similar yet truncated blade as the Sword of the Father, and a different hilt. This is actually the sword that King Regis had in the Dawn trailer. Promotional art that accompanied the trailer (see Gallery) shows Regis with the Sword of the Father, implying the "Dawn" sword is perhaps an early version of it.