Glossary

When you jump, you make either a Long Jump (horizontal) or a High Jump (vertical). See also “Long Jump” and “High Jump.”

When you would reduce a creature to 0 Hit Points with a melee attack, you can instead reduce the creature to 1 Hit Point. The creature then has the Unconscious condition and starts a Short Rest. The creature remains Unconscious until it regains any Hit Points or until someone uses an action to administer first aid to it, which requires a successful DC 10 Wisdom (Medicine) check.

You have Disadvantage on Wisdom (Perception) checks to see something in a Lightly Obscured space. See also “Dim Light” and “Playing the Game” (“Exploration”).

A Line is an area of effect that extends from a point of origin in a straight path along its length and covers an area defined by its width. The effect that creates a Line specifies its length and width. A Line’s point of origin isn’t included in the area of effect unless its creator decides otherwise.

When you make a Long Jump, you leap horizontally a number of feet up to your Strength score if you move at least 10 feet immediately before the jump. When you make a standing Long Jump, you can leap only half that distance. Either way, each foot you jump costs a foot of movement. If you land in Difficult Terrain, you must succeed on a DC 10 Dexterity (Acrobatics) check or have the Prone condition. This Long Jump rule assumes that the height of the jump doesn’t matter, such as a jump across a stream or chasm. At your GM’s option, you must succeed on a DC 10 Strength (Athletics) check to clear a low obstacle (no taller than a quarter of the jump’s distance), such as a hedge or low wall. Otherwise, you hit the obstacle.

A Long Rest is a period of extended downtime—at least 8 hours—available to any creature. During a Long Rest, you sleep for at least 6 hours and perform no more than 2 hours of light activity, such as reading, talking, eating, or standing watch. During sleep, you have the Unconscious condition. After you finish a Long Rest, you must wait at least 16 hours before starting another one. Benefits of the Rest. To start a Long Rest, you must have at least 1 Hit Point. When you finish the rest, you gain the following benefits: Regain All HP. You regain all lost Hit Points and all spent Hit Point Dice. If your Hit Point maximum was reduced, it returns to normal. Ability Scores Restored. If any of your ability scores were reduced, they return to normal. Exhaustion Reduced. If you have the Exhaustion condition, its level decreases by 1. Special Feature. Some features are recharged by a Long Rest. If you have such a feature, it recharges in the way specified in its description. Interrupting the Rest. A Long Rest is stopped by the following interruptions: - Rolling Initiative - Casting a spell other than a cantrip - Taking any damage - 1 hour of walking or other physical exertion If you rested at least 1 hour before the interruption, you gain the benefits of a Short Rest. See also “Short Rest.” You can resume a Long Rest immediately after an interruption. If you do so, the rest requires 1 additional hour per interruption to finish.

When you take the Magic action, you cast a spell that has a casting time of an action or use a feature or magic item that requires a Magic action to be activated. If you cast a spell that has a casting time of 1 minute or longer, you must take the Magic action on each turn of that casting, and you must maintain Concentration while you do so. If your Concentration is broken, the spell fails, but you don’t expend a spell slot. See also “Concentration.”

An effect is magical if it is created by a spell, a magic item, or a phenomenon that a rule labels as magical.

A monster is a creature controlled by the GM, even if the creature is benevolent. See also “Creature” and “NPC.”

A nonplayer character (NPC) is a monster that has a personal name and a distinct personality. See also “Monster.”

An object is a nonliving, distinct thing. Composite things, like buildings, comprise more than one object. See also “Breaking Objects.”

A space is occupied if a creature is in it or if it is completely filled by objects.

You can make an Opportunity Attack when a creature that you can see leaves your reach using its action, its Bonus Action, its Reaction, or one of its speeds. To make the Opportunity Attack, take a Reaction to make one melee attack with a weapon or an Unarmed Strike against the provoking creature. The attack occurs right before the creature leaves your reach. See also “Playing the Game” (“Combat”).

Passive Perception is a score that reflects a creature’s general awareness of its surroundings. The GM uses this score when determining whether a creature notices something without consciously making a Wisdom (Perception) check. A creature’s Passive Perception equals 10 plus the creature’s Wisdom (Perception) check bonus. If the creature has Advantage on such checks, increase the score by 5. If the creature has Disadvantage on them, decrease the score by 5. For example, a level 1 character with a Wisdom of 15 and proficiency in Perception has a Passive Perception of 14 (10 + 2 + 2). If that character has Advantage on Wisdom (Perception) checks, the score becomes 19.

If a rule says you can use something a certain number of times per day, that means you must finish a Long Rest to use it again after you run out of uses.

A player character is a character controlled by a player. See also “Character Creation.”

Some effects cause a creature to be possessed by another creature or entity. A possessing effect defines how the possession operates. Possession can be prevented by the Protection from Evil and Good spell and ended by the Dispel Evil and Good spell.

If you have proficiency with something, you can add your Proficiency Bonus to any D20 Test you make using that thing. A creature might have proficiency in a skill or saving throw or with a weapon or tool. See also “Playing the Game” (“Proficiency”).

A creature has a reach of 5 feet unless a rule says otherwise.

A Reaction is a special action taken in response to a trigger defined in the Reaction’s description. You can take a Reaction on another creature’s turn, and if you take it on your turn, you can do so even if you also take an action, a Bonus Action, or both. Once you take a Reaction, you can’t take another one until the start of your next turn. The Opportunity Attack is a Reaction available to all creatures. See also “Opportunity Attacks” and “Playing the Game” (“Actions”).