before both detect casting reduces

Black Pudding

Monsters Monster Manual

by the target takes a −1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10. The penalty can be removed by casting the Mending spell on the armor.Split

penalty reaches −5. The penalty can be removed by casting the Mending spell on the weapon. In 1 minute, the pudding can eat through 2 feet of nonmagical wood or metal. Spider Climb. The pudding

Gray Ooze

Monsters Monster Manual

":"Acid"} Acid damage. Nonmagical armor worn by the target takes a −1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10. The penalty can be removed by casting the Mending spell on the armor.Acid, Cold, Fire

the penalty reaches −5. The penalty can be removed by casting the Mending spell on the weapon. The ooze can eat through 2-inch-thick, nonmagical metal or wood in 1 round.Pseudopod. Melee Attack

Rust Monster

Monsters Monster Manual

creature with the object. Failure: The object takes a −1 penalty to the AC it offers (armor) or to its attack rolls (weapon). Armor is destroyed if the penalty reduces its AC to 10, and a weapon

is destroyed if its penalty reaches −5. The penalty can be removed by casting the Mending spell on the armor or weapon. Destroy Metal. The rust monster touches a nonmagical metal object within

Mind Flayer Arcanist

Monsters Monster Manual

liquid large enough to support the target. If this damage reduces the target to 0 Hit Points, the mind flayer kills it and magically devours its brain. Mind Burst (Recharge 5–6);{"diceNotation":"1d6

: Half damage only. Spellcasting. The mind flayer casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 17): At Will: Detect

Night Hag

Monsters Monster Manual

Coven Magic. While within 30 feet of at least two hag allies, the hag can cast one of the following spells, requiring no Material components, using the spell’s normal casting time, and using

DC 14): At Will: Detect Magic, Etherealness, Magic Missile (level 4 version) 2/Day Each: Phantasmal Killer, Plane Shift (self only)Cold, FireShape-Shift. The hag shape-shifting;shape-shifts into a

Mind Flayer

Monsters Monster Manual

":"Piercing"} Piercing damage. Success: Half damage. Failure or Success: If this damage reduces the target to 0 Hit Points, the mind flayer kills it and devours its brain. Mind Blast (Recharge 5–6

. Spellcasting. The mind flayer casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 15): At Will: Detect Thoughts 1/Day Each: Dominate Monster, Plane Shift (self only)Psychic

Arch-hag

Monsters Monster Manual

Coven Magic. While within 30 feet of at least two hag allies, the hag can cast one of the following spells, requiring no Material components, using the spell’s normal casting time, and using

spellcasting ability (spell save DC 22): At Will: Detect Thoughts, Dimension Door,Dispel Magic, Hypnotic Pattern 2/Day Each: Mass Suggestion, Modify Memory, Plane Shift Tongue Twister. The

Dirge

Spells Forgotten Realms: Heroes of Faerûn

save only once per turn. Casting as a Circle Spell. Casting this as a Circle spell requires a minimum of two secondary casters. If the spell is cast as a Circle spell, its duration becomes

lost Hit Points nor reduces the creature’s Exhaustion level. When the spell is cast, each secondary caster must expend a level 4+ spell slot; otherwise, the spell fails.

Encode Thoughts

Spells Guildmasters’ Guide to Ravnica

memory, idea, or message the thought strand contains. (Casting detect thoughts on the strand has the same effect.)

otherwise stationary. If you cast this spell while concentrating on a spell or an ability that allows you to read or manipulate the thoughts of others (such as detect thoughts or modify

Night Hag (Coven Variant) Legacy

Monsters Monster Manual (2014)

). She can innately cast the following spells, requiring no material components: At will: detect magic, magic missile 2/day each: plane shift (self only), ray of enfeeblement, sleep Magic

For casting these spells, each hag is a 12th-level spellcaster that uses Intelligence as her spellcasting ability. The spell save DC is 15, and the spell attack bonus is +7;{"diceNotation":"1d20+7

Pendragon Beestinger

Monsters Acquisitions Incorporated

Echo Spell (1/day). Pendragon can cast the spell he cast on his last turn, whose casting time becomes 1 bonus action. This bonus casting uses a spell slot as normal. Spellcasting. Pendragon is a 4th

following wizard spells prepared: Cantrips (at will): acid splash, light, mage hand, poison spray, shocking grasp 1st level (4 slots): detect magic, mage armor, magic missile, sleep 2nd level (3 slots

Balance of Harmony

Magic Items Tales from the Yawning Portal

This scale bears celestial symbols on one pan and fiendish symbols on the other. You can use the scale to cast detect evil and good as a ritual. Doing so requires you to place the scale on a solid

(consecrated) or evil (desecrated), and fluctuates slightly if it detects a creature appropriate to the spell but neither good nor evil. By touching the scales after casting the ritual, you instantly learn any information the spell can normally convey, and then the effect ends.

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

): detect magic, disguise self, shield, sleep 2nd level (3 slots): blur, invisibility, ray of enfeeblement 3rd level (3 slots): clairvoyance, lightning bolt, sending 4th level (3 slots): confusion

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

mind flayer. Hit: The target takes 55 (10d10);{"diceNotation":"10d10","rollType":"damage","rollAction":"Extract Brain","rollDamageType":"piercing"} piercing damage. If this damage reduces the target to

Oshundo the Alhoon

Monsters Phandelver and Below: The Shattered Obelisk

. Oshundo casts one of the following spells, requiring no material components and using Intelligence as the spellcasting ability (spell save DC 16): At will: dancing lights, detect magic, detect thoughts

within 60 feet of itself that is casting a spell. If the spell is 3rd level or lower, the spell fails, but any spell slots or charges aren’t wasted.Oshundo lived in Illithinoch at the height of the

Ooze Master

Monsters Tales from the Yawning Portal

1 round. Instinctive Attack. When the Ooze Master casts a spell with a casting time of 1 action, it can make one pseudopod attack as a bonus action. Spellcasting. The Ooze Master is a 9th-level

spells prepared: Cantrips (at will): acid splash, friends, mage hand, poison spray 1st level (4 slots): charm person, detect magic, magic missile, ray of sickness 2nd level (3 slots): detect thoughts

Night Hag Legacy

Monsters Basic Rules (2014)

). She can innately cast the following spells, requiring no material components: At will: detect magic, magic missile 2/day each: plane shift (self only), ray of enfeeblement, sleep Magic

(1d10);{"diceNotation":"1d10","rollType":"roll","rollAction":"Nightmare Haunting"}. If this effect reduces the target's hit point maximum to 0, the target dies, and if the target was evil, its soul is

Vanifer

Monsters Princes of the Apocalypse

, produce flame, thaumaturgy 1st level (4 slots): burning hands, chromatic orb, hellish rebuke, shield 2nd level (3 slots): darkness, detect thoughts, misty step, scorching ray 3rd level (3 slots

spell she previously cast using a lair action. Vanifer can take no other lair actions while concentrating on a spell cast as a lair action. Her favorite use of this capability is casting fireball or

Xvart Warlock of Raxivort Legacy

Monsters Volo's Guide to Monsters

Innate Spellcasting. The xvart's innate spellcasting ability is Charisma. It can innately cast the following spells, requiring no material components: At will: detect magic, mage armor (self only

its turns. Raxivort's Blessing. When the xvart reduces an enemy to 0 hit points, the xvart gains 4 temporary hit points. Raxivort's Tongue. The xvart can communicate with ordinary bat;bats and rat

Deathlock Wight Legacy

Monsters Tales from the Yawning Portal

Innate Spellcasting. The wight's innate spellcasting ability is Charisma (spell save DC 13). It can innately cast the following spells, requiring no verbal or material components: At will: detect

finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. A humanoid slain by this attack rises 24 hours later as a zombie under the wight's control, unless the humanoid

Cloud Giant Destiny Gambler

Monsters Bigby Presents: Glory of the Giants

): At will: detect magic, fog cloud, light, minor illusion 1/day each: dream (as an action), gaseous form, major image Thunderous Clap (Requires Cloud Rune). The giant magically summons a thundercloud

feet of itself casting a spell, the giant tries to interrupt it. If the creature is casting a spell using a spell slot of 3rd level or lower, the spell fails and has no effect. If the creature is

Iggwilv the Witch Queen

Monsters The Wild Beyond the Witchlight

): At will: detect magic, disguise self, invisibility, light, mage hand, message, prestidigitation, Tasha's hideous laughter 3/day each: dispel magic, fly, polymorph 1/day each: maze, telekinesis

, teleport, wishNegate Spell (2/Day). When Iggwilv sees a creature within 60 feet of her casting a spell, she tries to interrupt it. If the creature is casting a spell using a spell slot of 8th level or

Ulitharid Legacy

Monsters Volo's Guide to Monsters

, the elder brain can form a psychic link with any other creature the ulitharid can detect using its Creature Sense. Any such link ends if the creature falls outside the telepathy ranges of both the

is Intelligence (spell save DC 17). It can innately cast the following spells, requiring no components: At will: detect thoughts, levitate 1/day each: confusion, dominate monster, eyebite

Mind Flayer Prophet

Monsters Phandelver and Below: The Shattered Obelisk

Brain", "rollDamageType":"piercing"} piercing damage. If this damage reduces the target to 0 hit points, the mind flayer kills it by extracting and devouring its brain. Mind Whip (Recharge 5–6

of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 16): At will: detect magic, detect thoughts, levitate 1/day each: dominate

Qunbraxel

Monsters Phandelver and Below: The Shattered Obelisk

);{"diceNotation":"10d10", "rollType":"damage", "rollAction":"Extract Brain", "rollDamageType":"piercing"} piercing damage. If this damage reduces the target to 0 hit points, Qunbraxel kills it by extracting and

casts one of the following spells, requiring no spell components and using Charisma as the spellcasting ability (spell save DC 16): At will: detect magic, detect thoughts, levitate, mage armor (self only

Mind Flayer Lich (Illithilich) Legacy

Monsters Volo's Guide to Monsters

the following wizard spells prepared: Cantrips (at will): mage hand, prestidigitation, ray of frost 1st level (4 slots): detect magic, magic missile, shield, thunderwave 2nd level (3 slots): acid

arrow, detect thoughts, invisibility, mirror image 3rd level (3 slots): animate dead, counterspell, dispel magic, fireball 4th level (3 slots): blight, dimension door 5th level (3 slots): cloudkill

Jarad Vod Savo

Monsters Guildmasters’ Guide to Ravnica

":"poison"} poison damage to a creature he can see within 10 feet of him. Turn Resistance. Jarad has advantage on saving throws against any effect that turns undead. Undead Fortitude. If damage reduces

instead.Multiattack. Jarad makes two attacks: one with his Noxious Touch and one with his Staff of Svogthir. He can cast a spell with a casting time of 1 action in place of one of these attacks. Noxious Touch

Oinoloth Legacy

Monsters Mordenkainen’s Tome of Foes

. Innate Spellcasting. The oinoloth's innate spellcasting ability is Charisma (spell save DC 16). It can innately cast the following spells, requiring no material components: At will: darkness, detect

);{"diceNotation":"2d6","rollType":"roll","rollAction":"Corrupted Healing"}. This reduction can be removed only by a wish spell or by casting greater restoration on the target three times within the same

Yuan-ti Mind Whisperer Legacy

Monsters Volo's Guide to Monsters

, crown of madness, detect thoughts, expeditious retreat, fly, hypnotic pattern, illusory script Sseth's Blessing. When the yuan-ti reduces an enemy to 0 hit points, the yuan-ti gains 9 temporary hit

Withers

Monsters Tomb of Annihilation

":"Spellcasting"} to hit with spell attacks). He has the following wizard spells prepared: Cantrips (at will): acid splash, mage hand, minor illusion, prestidigitation 1st level (4 slots): detect magic

rest. The target dies if this effect reduces its hit point maximum to 0. A humanoid slain by this attack rises 24 hours later as a zombie under the wight's control, unless the humanoid is restored to

Neo-Otyugh

Monsters Infernal Machine Rebuild

, requiring no components: At will: detect thoughts 1/day each: command, hold personMultiattack. The neo-otyugh makes three attacks: one with its bite and two with its tentacles. Bite. Melee Weapon Attack: +8

. The target dies if the disease reduces its hit point maximum to 0. This reduction to the target's hit point maximum lasts until the disease is cured. Tentacle. Melee Weapon Attack: +8;{"diceNotation

Shemeshka

Monsters Planescape: Adventures in the Multiverse

): At will: alter self, darkness, invisibility (self only), mage hand, prestidigitation 2/day each: detect thoughts, dimension door, suggestion 1/day each: banishment, contact other plane (as an

action), mind blankFell Counterspell (3/Day). Shemeshka utters a magical word to interrupt a creature she can see that is casting a spell. If the spell is 5th level or lower, it fails and has no effect

Xvart Warlock of Raxivort

Monsters Mordenkainen Presents: Monsters of the Multiverse

Raxivort’s Blessing. When the xvart reduces an enemy to 0 hit points, the xvart gains 4 temporary hit points. Raxivort’s Tongue. The xvart can communicate with ordinary bat;bats and rat

components and using Charisma as the spellcasting ability (spell save DC 11): At will: detect magic, mage armor (self only), mage hand, minor illusion, prestidigitation 1/day each: burning hands

Oinoloth

Monsters Mordenkainen Presents: Monsters of the Multiverse

its hit point maximum is reduced by 7 (2d6);{"diceNotation":"2d6", "rollType":"roll", "rollAction":"Corrupted Healing"}. This reduction can be removed only by a wish spell or by casting greater

components and using Charisma as the spellcasting ability (spell save DC 16): At will: darkness, detect magic, dispel magic, hold monster, invisibility (self only) 1/day each: feeblemind, globe of

High Fae Mage

Monsters Monstrous Compendium Vol. 4: Eldraine Creatures

material components and using Charisma as the spellcasting ability (spell save DC 19): At will: dancing lights, detect magic, druidcraft, mage armor (self only) 2/day each: faerie fire, gust of wind

, mirror imageFae Counterspell. The high fae interrupts a creature it can see that is casting a spell with verbal, somatic, or material components. The caster takes 10 (3d6);{"diceNotation":"3d6

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