Vent

See also: Sanguine Vent and Stunner Vent

A Vent is a common type of a Trap frequently encountered throughout the game. Vents are hidden within the ground. Once triggered, they can cause continuous damage to those nearby.

Involvement

As traps, Vents encountered in the game generally come in 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 these kinds of Vents varies.
• Constantly issuing Vent. Constantly issuing Vents produce clouds of various damaging substances in an area – for example, hot steam or poisonous gas. Often combined with any fire-issuing traps, these vents can have the effect of a fuel-air explosion if triggered together.

Vents can be disarmed with the help of  Sleight of Hand skill, provided the interacting party member has a  Trap Disarm Toolkit in their inventory. Though the Difficulty Class can vary, the minimum requirement is a  DC 10 Sleight of Hand Check.

Apart from disarming, once a party member detects the exact location of the issuing aperture (with a successful  Perception roll), the harmful effect of a constantly issuing Vent can be prevented by placing (or throwing) any object large enough to cover them. Doing so immediately removes the harmful cloud from the space above the trap, but only while the covering object remains.

Disarmed Vents look almost same as newly spotted ones, but if previously triggered, depictions of their effects disappear. For example, parts of the floor around a toxin-spilling vent clear up after disarming the trap.

As a type of trap, Vents have the greatest degree of variation in the game, the specifics of which might not be encountered elsewhere.

Vent types

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