Vent

See also: Sanguine Vent and Stunner Vent

A Vent is a common type of a Trap that might be encountered almost in every location of the game.

A Vent is a mechanism hidden within the ground. It is implied to cause continuous damage to a trespasser who proceeds into locations where their presence is obviously unwanted.

Involvement

Vents encountered throughout the game may generally come in either of two types:

• Triggerable Vent. Triggerable Vents work upon stepping on them (or close to them), or upon interacting with trigger element nearby, as long as the trap is not disarmed. The effect of triggering this kind of Vents is various.
• Constantly issuing Vent. Constantly issuing Vents produce in the surrounding area clouds of various damaging substances, for example, hot steam or poisonous gas. Often combined with any fire-issuing traps, these vents might have the effect of a fuel-air explosion if triggered together.

A Vent can be disarmed with the help of  Sleight of Hand skill, but the interacting party member must have a  Trap Disarm Toolkit in their inventory. Minimal requirement is a  DC 10 Sleight of Hand Check roll, but the Difficulty Class may vary depending on circumstances.

Apart from disarming, there is another way to stop the harmful effect of a constantly issuing Vent. To do this, a party member must place (or throw) on-top the Vent any object massive enough to "fother the leak". Doing so will remove at once the harmful cloud from the space above the trap, but it is actually a half-way measure. Removing placed/thrown object without disarming the trap first will lead to activating the Vent anew. Besides, to do this, any party member must first make a successful  Perception roll to detect the exact place of the issuing aperture, otherwise it won't be possible to interact with it.

After disarming, a Vent will be pictured almost same as a newly spotted one, but if it was previously triggered, the depiction of its effect will disappear. For example, part of the floor around toxin-spilling vent will change to a clear one after disarming the trap.

Throughout Baldur's Gate 3, Vents are the type of Traps that features the biggest amount of variations accordingly to the place where they are planted. Some of these kinds cannot be encountered anywhere else in the game.

Grease vent

 Grease

Difficult terrain - movement speed is halved and creatures may fall Prone. Flammable.

Type: Surface

Condition: Prone

 Prone

Duration: 1 turn

 DEX Save (DC 12)

• Can't move or take  Actions,  Bonus Actions, or  Reactions, and has  Disadvantage on Strength and Dexterity  Saving Throws.
• Attacks against a Prone creature have  Advantage if they're made within 3 m (10 ft) of the creature.
• A Prone creature must spend half its  Movement Speed to stand up.
• Falling Prone immediately ends Concentration.
• If a creatures falls Prone on its turn, the turn immediately ends.

Condition: Difficult Terrain

 Difficult Terrain

Duration: Whilst on surface

• Movement Speed halved

Poison vent

 Poison Cloud

Chance to set Poisoned.

Type: Cloud

Condition: Poisoned

 Poisoned

Duration: 1 turn

 CON Save (DC 11)

• Suffers  Disadvantage on  Attack Rolls and Ability Checks.

Toxin vent

 Simple Toxin

Applies Poisoned.

Type: Surface

Condition: Simple Toxin

 Simple Toxin

Duration: 1 turn

 CON Save (DC 11)

• Affected entity takes 1d4⁠⁠Poison damage at the end of its next turn.

Void vent

 Void

 Blinds creatures and deals 2d8⁠⁠Cold damage at the end of the turn.

Type: Cloud

Condition: Blinded

 Blinded

Duration: Whilst on surface

• Has  Disadvantage on  Attack Rolls. Range of attacks and spells reduced to 3 m (10 ft).
• Attack Rolls against Blinded creatures have  Advantage.

Condition: Void Cloud

 Void Cloud

Duration: Whilst on surface

• Deals 2d8⁠⁠Cold damage at the end of the turn.

Condition: Difficult Terrain

 Difficult Terrain

Duration: Whilst on surface

• Movement Speed halved