Monsters FAQ

What are monsters in D&D?

Monsters are creatures and NPC-style opponents represented by stat blocks rather than player-class character sheets. A monster stat block gives the rules the DM needs to run that creature: Armor Class, hit points, speed, ability scores, relevant saving throws and skills, vulnerabilities, resistances, immunities, senses, languages, Challenge Rating, traits, actions, and any special reactions or legendary abilities. “Monster” is a game-reference category and does not mean every creature is evil or hostile.

In D&D, a monster is a creature designed to be run from a **stat block**. That stat block gives the Dungeon Master the information needed to use the creature during exploration, interaction, and combat without building it as a full player character.

Monster does not mean “evil”

The term is broad.

A stat block can represent:

  • a hostile beast;
  • an undead creature;
  • a dragon;
  • a fiend;
  • a construct;
  • an elemental;
  • a friendly creature;
  • a summoned creature;
  • a neutral wilderness animal;
  • a nonplayer character.

Whether the creature is an enemy depends on the adventure.

A Unicorn and a Zombie can both be represented as monsters even though their narrative roles are completely different.

A monster normally uses a stat block

Player characters gain a large amount of information from:

  • species;
  • class;
  • subclass;
  • background;
  • equipment;
  • feats;
  • spell choices;
  • level progression.

A monster instead compresses the relevant result into one stat block.

The DM normally uses the numbers already printed there.

For example, a monster's attack entry already gives the attack modifier and damage expression rather than requiring the DM to rebuild the attack from a class table.

Creature type matters

Monsters are also organized by creature type.

Common Fifth Edition types include:

  • Aberration;
  • Beast;
  • Celestial;
  • Construct;
  • Dragon;
  • Elemental;
  • Fey;
  • Fiend;
  • Giant;
  • Humanoid;
  • Monstrosity;
  • Ooze;
  • Plant;
  • Undead.

Type can matter when a spell or class feature says it affects only a particular kind of creature.

A feature that affects Undead does not automatically affect every “monster.”

The stat block describes the game mechanics

A normal stat block can contain:

Name Size, creature type, alignment Armor Class Hit Points Speed STR / DEX / CON / INT / WIS / CHA Saving Throws Skills Damage Vulnerabilities Damage Resistances Damage Immunities Condition Immunities Senses Languages Challenge Rating Traits Actions Reactions Legendary Actions

Not every creature has every line.

An absent Saving Throws line, for example, does not mean the monster can never make a saving throw.

It means the creature does not have specially listed saving throw proficiencies; use the relevant ability modifier unless another rule says otherwise.

Monsters can use the general rules too

A stat block's Action section lists the actions the monster is expected to use most often.

That does not mean the creature is forbidden from using general game actions.

A monster can still potentially:

  • Dash;
  • Disengage;
  • Dodge;
  • Help;
  • Hide;
  • Ready;
  • Search;
  • interact with the environment;

when the situation permits.

The stat block adds creature-specific options on top of the general rules.

Some monsters have unusual action economy

Powerful monsters may gain:

  • Multiattack;
  • reactions;
  • recharge abilities;
  • legendary actions;
  • lair actions;
  • regional effects.

These mechanics allow one creature to function as a more significant encounter and prevent every monster from being limited to one basic attack each round.

Challenge Rating provides a threat estimate

A stat block includes a Challenge Rating, usually abbreviated **CR**.

CR is a tool for estimating encounter difficulty and determining a monster's XP value.

It is not a guarantee that every party of the “matching” level will find the creature equally difficult.

Party size, tactics, resources, environment, magic items, terrain, surprise, monster combinations, and character builds can all change the real encounter.

Monsters can be customized

A DM can change a creature for a campaign.

That can include:

  • description;
  • personality;
  • hit points within an appropriate range;
  • equipment;
  • spells;
  • tactics;
  • environment;
  • narrative role.

More substantial mechanical changes can alter the creature's actual challenge.

A published stat block should therefore be distinguished from a campaign-modified version.