monster set with once area for for layers

Alarm

Spells Player’s Handbook

You set an alarm against intrusion. Choose a door, a window, or an area within range that is no larger than a 20-foot Cube. Until the spell ends, an alarm alerts you whenever a creature touches or

enters the warded area. When you cast the spell, you can designate creatures that won’t set off the alarm. You also choose whether the alarm is audible or mental: Audible Alarm. The alarm

Commune with Nature

Spells Player’s Handbook

, you could determine the location of a powerful monster in the area, the locations of bodies of water, and the locations of any towns.

You commune with nature spirits and gain knowledge of the surrounding area. In the outdoors, the spell gives you knowledge of the area within 3 miles of you. In caves and other natural underground

Glyph of Warding

Spells Player’s Handbook

) to conceal the glyph. The glyph can cover an area no larger than 10 feet in diameter. If the surface or object is moved more than 10 feet from where you cast this spell, the glyph is broken, and the

spell ends without being triggered. The glyph is nearly imperceptible and requires a successful Wisdom (Perception) check against your spell save DC to notice. When you inscribe the glyph, you set

Helm of Brilliance

Magic Items Dungeon Master’s Guide

This helm is set with 1d10 diamonds, 2d10 rubies, 3d10 fire opals, and 4d10 opals. Any gem pried from the helm crumbles to dust. When all the gems are removed or destroyed, the helm loses its magic

. You gain the following benefits while wearing the helm. Diamond Light. As long as it has at least one diamond, the helm emits a 30-foot Emanation. When at least one Undead is within that area, the

Otiluke's Freezing Sphere

Spells Player’s Handbook

A frigid globe streaks from you to a point of your choice within range, where it explodes in a 60-foot-radius Sphere. Each creature in that area makes a Constitution saving throw, taking 10d6 Cold

damage on failed save or half as much damage on a successful one. If the globe strikes a body of water, it freezes the water to a depth of 6 inches over an area 30 feet square. This ice lasts for 1

Symbol

Spells Player’s Handbook

You inscribe a harmful glyph either on a surface (such as a section of floor or wall) or within an object that can be closed (such as a book or chest). The glyph can cover an area no larger than 10

. The glyph is nearly imperceptible and requires a successful Wisdom (Perception) check against your spell save DC to notice. When you inscribe the glyph, you set its trigger and choose which effect the

Staff of Power

Magic Items Dungeon Master’s Guide

must expend to cast the spell. Spell Charge Cost Cone of Cold 5 Fireball (level 5 version) 5 Globe of Invulnerability 6 Hold Monster 5 Levitate 2 Lightning

charges in the staff . Each other creature in the area makes a DC 17 Dexterity saving throw. On a failed save, a creature takes Force damage equal to 4 times the number of charges in the staff . On a successful save, a creature takes half as much damage.

Deck of Illusions

Magic Items Dungeon Master’s Guide

This box contains a set of cards. A full deck has 34 cards: 32 depicting specific creatures and two with a mirrored surface. A deck found as treasure is usually missing 1d20 − 1 cards. The

91–93 Warrior Veteran 94–96 Wyvern 97–00 The card drawer *Stat blocks for these creatures (except the card drawer) appear in the Monster Manual.

Tarrasque

Monsters Monster Manual

":"Reflective Carapace"}. On a 1–5, the tarrasque is unaffected. On a 6, the tarrasque is unaffected and reflects the spell, turning the caster into the target. Siege Monster. The tarrasque deals

of this movement, the tarrasque creates an instantaneous shock wave in a 60-foot Emanation originating from itself. Creatures in that area lose Concentration and, if Medium or smaller, have the Prone

Demonomicon of Iggwilv

Magic Items Dungeon Master’s Guide

This treatise, composed by Iggwilv the archmage, documents the Abyss;Abyss's layers and inhabitants and is widely regarded as the most thorough and blasphemous tome of demonology in the multiverse

Fiend that you can see that is trapped within the area of a Magic Circle spell. The Fiend must succeed on a DC 20 Charisma saving throw with Disadvantage or become trapped within one of the Demonomicon

Crown of Horns

Magic Items Forgotten Realms: Adventures in Faerûn

The Crown of Horns contains the essence and intelligence of Myrkul, one of the Dead Three. This ghastly crown is a pale silver circlet with four curved bones set around its rim. On the crown's brow

is set a black diamond whose depths swirl with weird, malignant energy. Myrkul created the Crown of Horns at the height of his power. When Myrkul was slain by Mystra, he imbued the crown with his

Earth Elemental Legacy

Monsters Basic Rules (2014)

Earth Glide. The elemental can burrow through nonmagical, unworked earth and stone. While doing so, the elemental doesn't disturb the material it moves through. Siege Monster. The elemental deals

hill, club-like arms of jagged stone swinging at its sides. Its head and body consist of dirt and stone, occasionally set with chunks of metal, gems, and bright minerals.PoisonBludgeoning, Piercing, and Slashing from Nonmagical AttacksThunder

Alarm Legacy

Spells Basic Rules (2014)

You set an alarm against unwanted intrusion. Choose a door, a window, or an area within range that is no larger than a 20-foot cube. Until the spell ends, an alarm alerts you whenever a Tiny or

larger creature touches or enters the warded area. When you cast the spell, you can designate creatures that won't set off the alarm. You also choose whether the alarm is mental or audible. A mental alarm

Dust of Corrosion

Magic Items The Wild Beyond the Witchlight

As an action, you can throw this dust into the air, filling a 10-foot cube that extends out from you. Surfaces and objects made of nonmagical ferrous metal in the area instantly corrode and turn to

dust, becoming useless and unsalvageable. Any creature in the area that is made wholly or partly out of ferrous metal must make a DC 13 Constitution saving throw, taking 4d8 necrotic damage on a failed

Magmin Legacy

Monsters Basic Rules (2014)

area are ignited. Ignited Illumination. As a bonus action, the magmin can set itself ablaze or extinguish its flames. While ablaze, the magmin sheds bright light in a 10-foot radius and dim light for

Tower Sage

Monsters Quests from the Infinite Staircase

cone. Each creature in that area must succeed on a DC 13 Constitution saving throw or have the blinded condition until the end of the tower sage’s next turn. Spellcasting. The tower sage casts

elder sage. Tower sages are the only folk capable of reading the Books of Prophecy, an ancient set of tomes that hint at future events of grand significance. Tower Stewards For centuries, the Tower of the Heavens has been stewarded by dutiful folk who practice two distinct traditions.

Juiblex

Monsters Mordenkainen Presents: Monsters of the Multiverse

Juiblex chooses within the lair. The slime disintegrates after 1 hour. Slippery Slime. Juiblex slimes a square area of ground it can see within the lair. The area can be up to 10 feet on a side. When

the slime appears, each creature on it must succeed on a DC 21 Dexterity saving throw or fall prone and slide 10 feet in a random direction determined by a d8 roll. When a creature enters the area for

Helm of Brilliance Legacy

Magic Items Basic Rules (2014)

This dazzling helm is set with 1d10 diamonds, 2d10 rubies, 3d10 fire opals, and 4d10 opals. Any gem pried from the helm crumbles to dust. When all the gems are removed or destroyed, the helm loses

one diamond, the helm emits dim light in a 30-foot radius when at least one undead is within that area. Any undead that starts its turn in that area takes 1d6 radiant damage. As long as the helm has

Glyph of Warding Legacy

Spells Basic Rules (2014)

be closed (such as a book, a scroll, or a treasure chest) to conceal the glyph. The glyph can cover an area no larger than 10 feet in diameter. If the surface or object is moved more than 10 feet from

trigger so the spell activates only under certain circumstances or according to physical characteristics (such as height or weight), creature kind (for example, the ward could be set to affect aberrations

Mind Flayer Legacy

Monsters Monster Manual (2014)

Intelligence (spell save DC 15). It can innately cast the following spells, requiring no components: At will: detect thoughts, levitate 1/day each: dominate monster, plane shift (self only)Tentacles

flayer magically emits psychic energy in a 60-foot cone. Each creature in that area must succeed on a DC 15 Intelligence saving throw or take 22 (4d8 + 4);{"diceNotation":"4d8+4","rollType":"damage

Bag of Beans Legacy

Magic Items Basic Rules (2014)

, extending from the beans. Each creature in the area, including you, must make a DC 15 Dexterity saving throw, taking 5d4 fire damage on a failed save, or half as much damage on a successful one. The

fire ignites flammable objects in the area that aren't being worn or carried. If you remove a bean from the bag, plant it in dirt or sand, and then water it, the bean produces an effect 1 minute later

Assassin Bug

Monsters Mordenkainen's Fiendish Folio Volume 1

limited language ability suggests that the druids might have engaged in self-sacrifice to achieve their creation. Horrific Egg Layers. An assassin bug attacks with a paralytic bite to first

infested areas, guards patrol with burning brands and flaming swords, ready to set suspect dwellings ablaze. Fire is an effective destroyer of assassin bug maggots, and wild creatures observed running

Moloch

Monsters Mordenkainen Presents: Monsters of the Multiverse

toward Moloch. Breath of Despair (Recharge 5-6);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Breath of Despair"}. Moloch exhales in a 30-foot cube. Each creature in that area must

by this failure. He schemes of ways to reclaim his former status, but every time he enters the Nine Hells, he is demoted to an imp (see the Monster Manual) and can’t regain his normal powers

Freezing Sphere Legacy

Spells Basic Rules (2014)

A frigid globe of cold energy streaks from your fingertips to a point of your choice within range, where it explodes in a 60-foot-radius sphere. Each creature within the area must make a Constitution

including water-based creatures), it freezes the liquid to a depth of 6 inches over an area 30 feet square. This ice lasts for 1 minute. Creatures that were swimming on the surface of frozen water

Programmed Illusion Legacy

Spells Basic Rules (2014)

illusion can be activated again. The triggering condition can be as general or as detailed as you like, though it must be based on visual or audible conditions that occur within 30 feet of the area

. For example, you could create an illusion of yourself to appear and warn off others who attempt to open a trapped door, or you could set the illusion to trigger only when a creature says the correct

Otiluke's Freezing Sphere Legacy

Spells Player’s Handbook (2014)

A frigid globe of cold energy streaks from your fingertips to a point of your choice within range, where it explodes in a 60-foot-radius sphere. Each creature within the area must make a Constitution

including water-based creatures), it freezes the liquid to a depth of 6 inches over an area 30 feet square. This ice lasts for 1 minute. Creatures that were swimming on the surface of frozen water

Zindar

Monsters Tomb of Annihilation

slots): detect thoughts, knock 3rd level (3 slots): clairvoyance, tongues 4th level (3 slots): dominate beast, stoneskin 5th level (3 slots): hold monster, telekinesis 6th level (1 slot): true seeing

options: Fire Breath. Zindar exhales fire in a 15-foot cone. Each creature in that area must make a DC 15 Dexterity saving throw, taking 22 (4d10);{"diceNotation":"4d10","rollType":"damage

Druid Grove

Spells Xanathar's Guide to Everything

You invoke the spirits of nature to protect an area outdoors or underground. The area can be as small as a 30-foot cube or as large as a 90-foot cube. Buildings and other structures are excluded from

the affected area. If you cast this spell in the same area every day for a year, the spell lasts until dispelled. The spell creates the following effects within the area. When you cast this spell

Frost Salamander

Monsters Mordenkainen Presents: Monsters of the Multiverse

damage. Freezing Breath (Recharge 6);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Freezing Breath"}. The salamander exhales chill wind in a 60-foot cone. Each creature in that area must make

them to attack expeditions and settlements that other predators would avoid, as they often mistake the fire of a forge or a campfire for a large, tasty meal. azer;Azers (see the Monster Manual) use this

Zombie Plague Spreader

Monsters Van Richten’s Guide to Ravenloft

centered on itself. Each creature in that area must make a DC 12 Constitution saving throw, taking 14 (4d6);{"diceNotation":"4d6","rollType":"damage","rollAction":"Virulent Miasma","rollDamageType

":"poison"} poison damage on a failed save, or half as much damage on a successful one. A Humanoid reduced to 0 hit points by this damage dies and rises as a zombie (see its stat block in the Monster

Haunted One

Backgrounds Curse of Strahd: Character Options

, Religion, or Survival Languages: Choose two, one of which must be Abyssal, Celestial, Deep Speech, Draconic, Infernal, Primordial, Sylvan, or Undercommon Equipment: A Monster Hunter's Pack;monster

hunter's pack (containing a chest, a crowbar, a hammer, three stake (wooden);wooden stakes, a holy symbol, a holy water (flask);flask of holy water, a manacles; set of manacles, a mirror, steel;steel

Mind Flayer Arcanist Legacy

Monsters Monster Manual (2014)

spellcasting ability is Intelligence (spell save DC 15). It can innately cast the following spells, requiring no components: At will: detect thoughts, levitate 1/day each: dominate monster, plane shift (self

(Recharge 5–6);{"diceNotation":"1d6","rollType":"recharge","rollAction":"Mind Blast"}. The mind flayer arcanist magically emits psychic energy in a 60-foot cone. Each creature in that area must succeed on

Brain in a Jar (Noncore)

Monsters Lost Laboratory of Kwalish

each: charm person, command, hold person 1/day each: compulsion, hold monster, sleep (cast at 3rd level), Tasha's hideous laughterMind Blast (Recharge 5-6);{"diceNotation":"1d6","rollType":"recharge

","rollAction":"Mind Blast"}. The brain in a jar magically emits psychic energy in a 60-foot cone. Each creature in that area must succeed on a DC 15 Intelligence saving throw or take 13 (2d8 + 4

Juiblex Legacy

Monsters Out of the Abyss

creature enters the area for the first time on a turn or ends its turn there, that creature must make the same save.If the slime is set on fire, it burns away after 1 round. Any creature that starts its

initiative ties), Juiblex can take a lair action to cause one of the following effects; it can’t use the same effect two rounds in a row: Juiblex slimes a square area of ground it can see within the

Devourer

Monsters Mordenkainen Presents: Monsters of the Multiverse

5 Hit Dice, it becomes a ghoul. Otherwise, it becomes a wight. (All three appear in the Monster Manual.) A devourer can imprison only one creature at a time. Soul Rend (Recharge 6);{"diceNotation

":"1d6", "rollType":"recharge", "rollAction":"Soul Rend"}. The devourer creates a vortex of life-draining energy in a 20-foot radius centered on itself. Each creature in that area must make a DC 18

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