The Infernal Rapier is a very rare weapon in Baldur’s Gate 3 (BG3) obtainable by completing the Blade of Frontiers quest at the end of Act 2.

The Infernal Rapier is one of the most sought-after weapons in Baldur’s Gate 3, prized not only for its deadly power but also for its fiery, infernal origins. This unique weapon can make a massive difference in combat, offering both style and substance to players who wield it. However, acquiring the Infernal Rapier is no easy feat—it requires navigating treacherous paths, uncovering hidden secrets, and dealing with the dark forces that guard it. In this guide, we’ll explore the Infernal Rapier, how to acquire it, and tips for using it effectively in Baldur’s Gate 3.
What is the Infernal Rapier in BG3?

In Baldur’s Gate 3, the Infernal Rapier is a very rare weapon you can earn as a reward for freeing Mizora at the end of Act 2 and convincing her that you deserve a reward. This weapon offers 1d8 + 2 piercing damage and allows you to summon a level 6 Cambion Planar Ally. The Planar Ally is a powerful summon and this weapon can be used on many characters to simply summon the powerful Combion Planar Ally.
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Infernal Rapier Abilities and Effects
Below are all the features, abilities, and effects of Infernal Rapier in Baldur’s Gate 3:
- Weapon Type: Rapier
- Damage: 1d8 + 2 Piercing damage
- Proficiency Requirement: martial weapon
- Rarity: Very Rare
- Weight: 0.9 kg / 1.8 lb
- Price: 960 gp
- Where to Find: Completing the Blade of Frontier’s quest in Act 2 and free Mizora.
- Special Bonuses
- High Spellcasting: You gain a +1 bonus to Spell Save DC.
- Melee Caster: Instead of its Dexterity Modifier, the affected entity adds its Spellcasting Ability Modifier to Attack rolls.
- Planar Ally: Cambion cast as a level 6 spell, recharge with a long rest.
- Classes with Proficiency: Barbarian, Bard, Fighter, Paladin, Ranger, Rogue
- Races with Proficiency: Drow
How to Get the Infernal Rapier in BG3? Explained

To get the Infernal Rapier in Baldur’s Gate 3, you need to bring Wyll with you at the end of Act 2, free Mizora, and convince her to reward you for saving her. The Blade of Frontiers companion quest for Wyll is automatically added when you find and recruit him in Druid Grove early in Act 1. From that point, you need to recruit Karlach and solve Wyll’s disagreement. Continue completing content until much later in Act 2. Wyll can be at your camp while you advance the story and quest until you’ve reached “rescue Zariel’s Assest from Moonrise Towers.” At this point, you will need to bring Wyll with you before traveling below the Moonrise Tower. The game will give you a popup warning before venture, make sure he’s in your party!

Explore Moonrise Tower
The next step in getting the Infernal Rapier in Baldur’s Gate 3 is to explore the basement of Moonrise Tower and move towards the northwest section which should be highlighted on your map. Within the Tadpoling Centre, there will be a Mind Flayer Pod which you can interact with. Mizora is found inside, and you should free her. You can use Iliithid’s powers, strength, and others to remove her from the Pod. Once this is done, she will blather on like usual, but you need to convince her that you deserve a reward. Pass a 14 DC check and she will grant you the Infernal Rapier as a reward.
Here is a step-by-step on how to obtain the Infernal Rapier in Baldur’s Gate 3 (BG3):
- Recruit Wyll in Druids Grove
- Recruit Karlach and resolve their issues
- Continue to progress to Moonrise Towers in Act 2
- Solve the Gauntlet of Shar, which will trigger the Moonrise Tower Fight
- Atop Moonrise Tower, you will receive a warning you cannot turn back, you must bring Wyll
- Explore the underground of Moonrise Tower
- Move to the Tadpoling Centre below Moonrise, Coordinates X:675 Y:43 to find Mizora in a Mind Flayer Pod
- Free her from the Pod with Strength or Illithid Powers
- After freeing her, select “[persuasion[ You’d think we’d get a reward for going through all this trouble.”
- Pass the DC14 check, and you are granted Baldur’s Gate 3 Infernal Rapier weapon!

How to Use the Infernal Rapier in BG3?
The strength of the Infernal Rapier in Baldur’s Gate 3 is gaining access to a free level 6 Cambion spell. The Planar Ally Cambion is a high-mobility spell caster with three attacks. Below are the Cambion’s abilities:
- Rush Attack: Charge forward and attack the first enemy in your way, possibly pushing them Off Balance.
- Fiendish Charm: Charm a humanoid to prevent it from attacking you. You gain an Advantage on Charisma Ability Checks in dialogue.
- Rays of Fire: 3x 3d6 fire damage.
- Draining Kiss: 5d10 + 5 Psychic damage Lay a deadly kiss upon a foe Charmed by your Fiendish Charm.
- Fly: using movement at the range of 16 meters.
The combo with the Cambion is to Charm a humanoid creature on turn one, then follow up with the Draining Kiss ability for massive psychic damage. The Ray of Fire spell also similar to Scorching Ray is helpful for range damage as well. Lastly, make sure to cast this Cambion using the Rapier following a long rest. This ally doesn’t go away with others and can “stack” or have a swarm of zombies and skeletons. Also, you can equip a spell caster with proficiency who doesn’t use weapon attacks like the Bard and get a free powerful spell!
Tips and Tricks for the Infernal Rapier in BG3
These are the best tips and tricks for finding and using the Infernal Rapier in Baldur’s Gate 3:
- To get the Infernal Rapier, you MUST have Wyll in your party when you enter the Tadpole Center in the Mind Flayer Colony. To be safe, it’s best to put him in your party before you descend into the Colony from the top of Moonrise Towers.
- To convince Mizora to give you a reward, you must pass a 14 DC Persuasion check. Persuasion is a Charisma based skill. Therefore, if your own character doesn’t have high Charisma, take control of Wyll directly to rescue Mizora.
- If you summon the Cambion, but then unequip the Infernal Rapier, this action will dismiss the Cambion.
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FAQs about Infernal Rapier in Baldur’s Gate 3
Where to find Infernal Rapier in Baldur’s Gate 3?
The Infernal Rapier is found in the Mind Flayer Colony at Coordinates X: 676 Y: 39 during the end of Act 2. You must bring the companion Wyll during this part of the game and complete a DC 14 persuasion check and ask for the reward.
Do you need Wyll in the party to get the Infernal Rapier?
Yes, Wyll must be in your party to interact with Mizora who gives Wyll the Infernal Rapier as a companion reward.
What is the best rapier in Baldur’s Gate 3?
The best Rapier in BG3 is the Duellist’s Prerogative because the user gains an additional action and can use a reaction to deal necrotic damage.
How to get the legendary rapier in BG3?
The legendary Rapier Duellist’s Prerogative is obtained by completing the Save Vanra quest in Lora’s House at coordinates X: -65 Y: -89 in Act 3.
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