Monster List

Monsters (A)


Large aberration, lawful evil Armor Class 17 (natural armor) Hit Points 135 (18d10+36) Speed 10 ft., swim 40 ft. STR DEX CON INT WIS CHA 21 (+5) 9 (-1) 15 (+2) 18 (+4) 15 (+2) 18 (+4) Saving Throws Con +6, Int +8, Wis +6 Skills History +12, Perception +10 Senses darkvision 120 ft., passive Perception 20 Languages Deep Speech, telepathy 120 ft. Challenge 10 (5,900 XP) Amphibious. The aboleth can breathe air and water. Mucous Cloud. While underwater, the aboleth is surrounded by transformative mucus. A creature that touches the aboleth or that hits it with a melee attack while within 5 feet of it must make a DC 14 Constitution saving throw. On a failure, the creature is diseased for 1d4 hours. The diseased creature can breathe only underwater. Probing Telepathy. If a creature communicates telepathically with the aboleth, the aboleth learns the creature’s greatest desires if the aboleth can see the creature.
Multiattack. The aboleth makes three tentacle attacks. Tentacle. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 12 (2d6+5) bludgeoning damage. If the target is a creature, it must succeed on a DC 14 Constitution saving throw or become diseased. The disease has no effect for 1 minute and can be removed by any magic that cures disease. After 1 minute, the diseased creature’s skin becomes translucent and slimy, the creature can’t regain hit points unless it is underwater, and the disease can be removed only by heal or another disease-curing spell of 6th level or higher. When the creature is outside a body of water, it takes 6 (1d12) acid damage every 10 minutes unless moisture is applied to the skin before 10 minutes have passed. Tail. Melee Weapon Attack: +9 to hit, reach 10 ft. one target. Hit:...

Legendary Creatures

A legendary creature can do things that ordinary creatures can’t. It can take special actions outside its turn, and it might exert magical influence for miles around. If a creature assumes the form of a legendary creature, such as through a spell, it doesn’t gain that form’s legendary actions, lair actions, or regional effects.

Legendary Actions

A legendary creature can take a certain number of special actions-called legendary actions-outside its turn. Only one legendary action option can be used at a time and only at the end of another creature’s turn. A creature regains its spent legendary actions at the start of its turn. It can forgo using them, and it can’t use them while incapacitated or otherwise unable to take actions. If surprised, it can’t use them until after its first turn in the combat.

A Legendary Creature’s Lair

A legendary creature might have a section describing its lair and the special effects it can create while there, either by act of will or simply by being present. Such a section applies only to a legendary creature that spends a great deal of time in its lair.

Lair Actions

If a legendary creature has lair actions, it can use them to harness the ambient magic in its lair. On initiative count 20 (losing all initiative ties), it can use one of its lair action options. It can’t do so while incapacitated or otherwise unable to take actions. If surprised, it can’t use one until after its first turn in the combat.

Regional Effects

The mere presence of a legendary creature can have strange and wondrous effects on its environment, as noted in this section. Regional effects end abruptly or dissipate...

Monster Statistics


A monster’s type speaks to its fundamental nature. Certain spells, magic items, class features, and other effects in the game interact in special ways with creatures of a particular type. For example, an arrow of dragon slaying deals extra damage not only to dragons but also other creatures of the dragon type, such as dragon turtles and wyverns. The game includes the following monster types, which have no rules of their own. Aberrations are utterly alien beings. Many of them have innate magical abilities drawn from the creature’s alien mind rather than the mystical forces of the world. The quintessential aberrations are aboleths, beholders, mind flayers, and slaadi. Beasts are nonhumanoid creatures that are a natural part of the fantasy ecology. Some of them have magical powers, but most are unintelligent and lack any society or language. Beasts include all varieties of ordinary animals, dinosaurs, and giant versions of animals. Celestials are creatures native to the Upper Planes. Many of them are the servants of deities, employed as messengers or agents in the mortal realm and throughout the planes. Celestials are good by nature, so the exceptional celestial who strays from a good alignment is a horrifying rarity. Celestials include angels, couatls, and pegasi. Constructs are made, not born. Some are programmed by their creators to follow a simple set of instructions, while others are imbued with sentience and capable of independent thought. Golems are the iconic constructs. Many creatures native to the outer plane of Mechanus, such as modrons, are constructs shaped from the raw material of the plane by the will of more powerful creatures. Dragons are large reptilian creatures of ancient origin and tremendous power. True dragons, including the good metallic dragons and...