The Sword of the Crusader represents the offensive pinnacle of the Divine Crusader’s relics in the Knights of the Nine expansion. This legendary blade, once wielded by Pelinal Whitestrake, is more than a simple weapon; it is a symbol of holy authority within Cyrodiil. Obtaining it requires traversing dangerous subterranean depths and confronting a ghost of the order's past. However, simply picking up the blade is not enough, as the weapon starts in a defiled state, carrying a debilitating curse that can cripple unprepared adventurers. Understanding the nuances of the quest, the mechanics of its purification, and the specific level-scaling attributes is essential for any player aiming to restore the ancient order.

Quest Initiation and Prerequisites

The journey to reclaim the sword begins immediately following the conclusion of the quest "The Faithful Squire." After the tragic events involving Sir Roderic, players are directed toward Underpall Cave. This location serves as the final resting place—or rather, the restless haunting grounds—of Lord Berich Vlindrel, a former knight who fell from grace and took the holy blade with him into darkness.

Before departing for Underpall Cave, located southwest of Bruma, ensure that your Infamy remains at 1 or less. The Crusader's relics are bound by divine mandate; should your character's reputation be tainted by crime or dark deeds, the relics will refuse to be equipped. If you find yourself unable to wear the pieces you have already gathered, a new pilgrimage to the wayshrines of the Nine Divines will be necessary to reset your Infamy before proceeding with the sword's recovery.

Navigating Underpall Cave

Underpall Cave is a sprawling complex that blends natural limestone caverns with the ruins of a submerged fort. For those playing the remastered version of the game, the environmental details here are significantly enhanced, but the layout remains a multi-zone challenge.

The Path to the Reflecting Chamber

There are five distinct zones within the cave, but only three are mandatory to reach the objective. Upon entering, the goal is to reach the Underpall Keep. The initial zones are populated with standard undead fare—skeletons, ghosts, and zombies that scale with player level.

  1. Underpall Cave Entry: Follow the compass marker through the initial tunnels. The path is relatively linear until you reach the wooden door leading to the Keep.
  2. Underpall Keep: This area features more structured architecture. Be cautious of traps, specifically falling rocks and pressure plates that can deal significant physical damage. Skeletons often inhabit the corridors here. Moving south leads to the door of the Reflecting Chamber.
  3. Underpall Reflecting Chamber: This is the final zone. Inside, you have two primary tactical choices. The left path is the most direct; it takes you past the corpse of Sir Roderic but is heavily guarded. The right path is longer and loops around the perimeter, offering a stealthier approach that allows you to flank the Boss.

Confronting Lord Berich Vlindrel

At the heart of the Reflecting Chamber waits the wraith of Lord Berich Vlindrel. Unlike typical wraiths, Vlindrel possesses a higher resistance to standard weaponry and utilizes a range of offensive spells that can drain attributes or silence casters.

Combat Tactics

Since Lord Vlindrel wields the defiled Sword of the Crusader, his melee attacks are potent. Using the Mace of the Crusader, if already obtained, provides a significant advantage due to its holy enchantments. Fire-based destruction spells are also highly effective against his spectral form.

An important technical tip: try to lure Lord Vlindrel away from the reflecting pool in the center of the room. If he is defeated while standing over the water, the sword may fall into the pool upon his death. Due to the game's physics, retrieving items from deep water in these ruins can be unnecessarily tedious. Once the wraith is dissipated, loot the "Defiled Sword of the Crusader" from his remains.

The Curse of the Defiled Blade

Upon picking up the sword, your quest log will update, noting that the blade feels cold and heavy with evil. A critical warning must be issued here: do not equip the defiled sword.

Equipping the blade before it has been purified at the Chapel of Arkay will inflict "Lord Vlindrel's Curse" upon the player. This is not a temporary debuff that vanishes when the sword is unequipped. It is a persistent affliction that remains until the sword is sanctified. The curse includes:

  • Stunted Magicka: Your magicka will no longer regenerate over time. For mages or spell-sword builds, this effectively shuts down your primary combat resources.
  • 100% Weakness to Fire, Frost, Shock, Magic, and Poison: You become twice as vulnerable to almost every form of non-physical damage in the game. In high-level play, a single spell from an enemy caster can result in an instant death under this curse.

If you accidentally equip the sword and receive the curse, the only solution is to finish the purification process as quickly as possible.

Purification at the Chapel of Arkay

The next step requires a journey to the city of Cheydinhal. Travel to the Great Chapel of Arkay to reconsecrate the relic. However, peace does not await you there.

The Auroran Attack

As part of the ongoing war between the Nine Divines and the Daedric Prince Umaril the Unfeathered, the chapel will be under siege by Aurorans—Umaril’s golden-armored minions. These enemies are formidable, possessing high health pools and resistance to shock damage. You must eliminate all Aurorans inside the chapel to proceed.

Be extremely careful with your strikes and spells during this chaotic battle. The chapel is often filled with civilian NPCs and clergy. Accidental friendly fire that results in the death of a chapel member will increase your Infamy, potentially making you unfit to wear the very relics you are trying to save.

The Altar of the Nine

Once the chapel is cleared of hostiles, approach the Altar of the Nine in the center of the sanctum. Activating the altar while the defiled sword is in your inventory will trigger the purification. The sword will briefly disappear and then be returned to you in its holy state. Your journal will confirm that you now possess all the relics required to face Umaril.

The Restoration Trainer Dilemma

There is a well-known logistical issue involving the quest at Cheydinhal that high-level players must consider. Ohtesse, the advanced Restoration trainer in the Cheydinhal Chapel, is scripted to die during the Auroran attack.

In the vanilla game and even in most remastered versions without specific unofficial patches, her death is almost certain. If you are pursuing Master-level Restoration training, you must obtain the reference from Ohtesse before triggering the battle in the chapel. If she dies before giving you the reference, you may find yourself locked out of the highest level of Restoration training for the remainder of that playthrough. Planning your training progression before entering the chapel is highly recommended.

Sword Stats and Level-Scaling Mechanics

The Sword of the Crusader is a leveled item. Its damage, enchantment potency, and health are determined by your character's level at the moment you receive the purified version.

Level Tiers (Base Stats)

  • Levels 1-6: ~10 Fire Damage, 10 Magicka Damage. (Iron Quality equivalent)
  • Levels 16-20: ~20 Fire Damage, 20 Magicka Damage. (Ebony Quality equivalent)
  • Level 21+: ~25 Fire Damage, 25 Magicka Damage. (Daedric Quality equivalent)

In addition to the strike enchantments, the sword grants the "Crusader’s Arm" ability, which provides a constant +10 fortification to your Blade skill, allowing you to surpass the standard 100-point cap.

The Armor Stand Update Trick

A unique mechanic of the Knights of the Nine DLC allows you to keep the sword relevant as you level up. In the basement of the Priory of the Nine, there is a specialized armor stand for the Crusader's relics. If you obtained the sword at level 5 but have since reached level 25, you can place the sword on the stand and then take it back. This action automatically re-scales the sword to the Level 21+ tier, updating its stats and enchantments to the highest possible version. This makes the Sword of the Crusader one of the few weapons in Oblivion that never becomes obsolete due to early-game acquisition.

Lore and Combat Synergy

From a lore perspective, the sword is the partner to the Mace of the Crusader (the weapon of Zenithar). While the mace is often associated with the early stages of the questline, the sword is the weapon intended for the final confrontation with Umaril.

In combat, the sword's "Crusader's Bane" effect is vital. When hitting Umaril in the physical plane, the sword inflicts a temporary 83% weakness to fire. This synergizes perfectly with the sword's own fire damage enchantment, creating a feedback loop of massive damage. When paired with the full set of Crusader armor, which provides the "Holy Aura" (Shield and attribute debuffs for Umaril), the player becomes a specialized engine of destruction against Daedric entities.

Managing Infamy and Holy Status

Owning the sword comes with the permanent responsibility of maintaining a low Infamy score. If your Infamy ever exceeds 1, you will receive a message stating you are no longer fit to wield the relics. The sword will be automatically unequipped and cannot be drawn until you repent.

To manage this in the late game:

  1. Avoid the Dark Brotherhood and Thieves Guild: These questlines inherently raise Infamy.
  2. The Pilgrimage: If you must commit crimes, be prepared to walk the Pilgrim's Way again. Visiting one of each of the nine wayshrines around Cyrodiil will reset your Infamy to zero.
  3. The Gray Cowl: For those who have completed the Thieves Guild, wearing the Gray Cowl of Nocturnal will attribute all Infamy to the persona of the Gray Fox, allowing your primary identity to remain holy and capable of wielding the sword.

Final Verdict

The Crusader Sword in Oblivion is arguably the best one-handed weapon for a righteous character build. Its ability to scale with the player, combined with the powerful Blade skill fortification and the dual-damage enchantment, places it in the top tier of artifacts. While the quest involves significant danger—both from the wraith of Lord Vlindrel and the risk of losing access to Restoration training—the reward is a blade that defines the ultimate hero of the Third Era. By following the purification steps and respecting the divine restrictions of the blade, you ensure your readiness for the final battle against the Unfeathered and the preservation of the Nine Divines' influence in Tamriel.