Conditions are states imposed on creatures by various effects, including powers, traps, and the environment. A condition is usually temporary, imposing a penalty, a vulnerability, a hindrance, or a combination of effects.

Duration: The effect that imposes a condition on a creature specifies how long the condition lasts. For instance, a cleric...

No Degrees of Effect: Conditions don't have degrees of effect; either a creature has a condition, or it doesn't. Putting the same...

• A blinded creature can't see and automatically fails any ability check that requires sight.
• Attack rolls against the creature have advantage, and the creature's attack rolls have disadvantage.

The bloodied value of a typical creature equals one-half it maximum hit points. A creature is bloodied when its current hit points drop to its bloodied value or lower. Certain powers and effects work only against a bloodied target or work better against such a target. An object is never considered to be bloodied.

When an unbloodied creature is killed outright, the creature does not become bloodied in the process. It is just dead. The rule means a minion, which has only 1 hit point, is bloodied only if an attacker reduces the minion to 0 hit points but knocks it unconscious instead of killing it.

• A charmed creature can't attack the charmer or target the charmer with harmful abilities or magical effects.
• The charmer has advantage on any ability check to interact socially with the creature.

When a creature is Dead it is considered Removed from Play and takes no further part in a combat.

• A deafened creature can't hear and automatically fails any ability check that requires hearing.

• A frightened creature has disadvantage on ability checks and attack rolls while the source of its fear is within line of sight.
• The creature can't willingly move closer to the source of its fear.

A dying creature is unconscious and must make death saving throws. Monsters normally die when they drop to 0 hit points, so they suffer this condition only in exceptional situations.

• A grappled creature's speed becomes 0, and it can't benefit from any bonus to its speed.
• The condition ends if the grappler is incapacitated (see the condition).
• The condition also ends if an effect removes the grappled creature from the reach of the grappler or grappling effect, such as when a creature is hurled away by the thunderwave spell.

• An incapacitated creature can't take actions or reactions.

• An invisible creature is impossible to see without the aid of magic or a special sense. For the purpose of hiding, the creature is heavily obscured. The creature's location can be detected by any noise it makes or any tracks it leaves.
• Attack rolls against the creature have disadvantage, and the creature's attack rolls have advantage.

• A paralysed creature is incapacitated (see the condition) and can't move or speak.
• The creature automatically fails Strength and Dexterity saving throws. Attack rolls against the creature have advantage.
• Any attack that hits the creature is a critical hit if the attacker is within 5 feet of the creature.

When a creature marks a target, the target takes a -2 penalty to attack rolls for any attack that doesn't include the marking creature as a target. A creature can be subjected to only one mark at a time, and a new mark supersedes an old one. A mark ends immediately when its creator dies or falls unconscious.

• A petrified creature is transformed, along with any nonmagical object it is wearing or carrying, into a solid inanimate substance (usually stone). Its weight increases by a factor of ten, and it ceases aging.
• The creature is incapacitated (see the condition), can't move or speak, and is unaware of its surroundings.
• Attack rolls against the creature have advantage.
• The creature automatically fails Strength and Dexterity saving throws.
• The creature has resistance to all damage.
• The creature is immune to poison and disease, although a poison or disease already in its system is suspended, not neutralized.

• A poisoned creature has disadvantage on attack rolls and ability checks.

• A prone creature's only movement option is to crawl, unless it stands up and thereby ends the condition. The creature has disadvantage on attack rolls.
• An attack roll against the creature has advantage if the attacker is within 5 feet of the creature. Otherwise, the attack roll has disadvantage.

Some effects can temporarily remove a creature from play. While a creature is removed from play, its turns start and end as normal, but it can't take actions. In addition, it has neither line of sight nor line of effect to anything, and nothing has line of sight or line of effect to it.

• A restrained creature's speed becomes 0, and it can't benefit from any bonus to its speed.
• Attack rolls against the creature have advantage, and the creature's attack rolls have disadvantage.
• The creature has disadvantage on Dexterity saving throws.

• A stunned creature is incapacitated (see the condition), can't move, and can speak only falteringly.
• The creature automatically fails Strength and Dexterity saving throws.
• Attack rolls against the creature have advantage.

• An unconscious creature is incapacitated, can't move or speak, and is unaware of its surroundings.
• The creature drops whatever it's holding and falls prone.
• The creature automatically fails Strength and Dexterity saving throws.
• Attack rolls against the creature have advantage.
• Any attack that hits the creature is a critical hit if the attacker is within 5 feet of the creature.