Hazard
A hazard is an environmental danger. See also “Burning,” “Dehydration,” “Falling,” “Malnutrition,” and “Suffocation.”
Healing
Healing is how you regain Hit Points. See also “Playing the Game” (“Damage and Healing”).
Heavily Obscured
You have the Blinded condition while trying to see something in a Heavily Obscured space. See also “Blinded,” “Darkness,” and “Playing the Game” (“Exploration”).
Help [Action]
When you take the Help action, you do one of the following. Assist an Ability Check. Choose one of your
Heroic Inspiration
If you (a player character) have Heroic Inspiration, you can expend it to reroll any die immediately after rolling it, and you must use the new roll. If you gain Heroic Inspiration but already have it, it’s lost unless you give it to a player character who lacks it.
Hide [Action]
With the Hide action, you try to hide yourself. To do so, you must succeed on a DC 15 Dexterity (Stealth) check while you’re Heavily Obscured or behind Three-Quarters Cover or Total Cover, and you must be out of any enemy’s line of sight; if you can see a creature, you can discern whether it can see you. On a successful check, you have the Invisible condition while hidden. Make note of your check’s total, which is the DC for a creature to find you with a Wisdom (Perception) check. You stop being hidden immediately after any of the following occurs: you make a sound louder than a whisper, an enemy finds you, you make an attack roll, or you cast a spell with a Verbal component.
High Jump
When you make a High Jump, you leap into the air a number of feet equal to 3 plus your Strength modifier (minimum of 0 feet) if you move at least 10 feet on foot immediately before the jump. When you make a standing High Jump, you can jump only half that distance. Either way, each foot of the jump costs a foot of movement. You can extend your arms half your height above yourself during the jump. Thus, you can reach a distance equal to the height of the jump plus 11/2 times your height.
Hit Point Dice
Hit Point Dice, or Hit Dice for short, help determine a player character’s Hit Point maximum, as explained in “Character Creation.” Most monsters also have Hit Dice. A creature can spend Hit Dice during a Short Rest to regain Hit Points. See also “Short Rest.”
Hit Points
Hit Points (HP) are a measure of how difficult it is to kill or destroy a creature or an object. Damage reduces Hit Points, and healing restores them. You can’t have more Hit Points than your Hit Point maximum, and you can’t have less than 0. See also “Breaking Objects” and “Playing the Game” (“Damage and Healing”).
Hostile [Attitude]
A Hostile creature views you unfavorably. You have Disadvantage on an ability check to influence a Hostile creature. See also “Influence.”
Hover
Some creatures can hover, as noted in their stat blocks, and some spells and other effects grant the ability to hover. Hovering while flying prevents you from falling in certain circumstances. See also “Flying.”