Conditions alter a creature’s capabilities in a variety of ways and can arise as a result of a spell, a class feature, a monster’s attack, or other effect. Most conditions, such as blinded, are impairments, but a few, such as invisible, can be advantageous. A condition lasts either until it is countered (the prone condition is countered by standing up, for example) or for a duration specified by the effect that imposed the condition. If multiple effects impose the same condition on a creature, each instance of the condition has its own duration, but the condition’s effects don’t get worse. A creature either has a condition or doesn’t. The following definitions specify what happens to a creature while it is subjected to a condition.

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.

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.