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Returning 35 results for 'diameter instead are brain'.
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Magic Items
Dungeon Master’s Guide
its normal casting time, and you can’t use this property again until you finish a Short or Long Rest. On a failed check, you fail to cast the spell and a random effect occurs instead
, and attacks you.
91–95
A vertical, 10-foot-diameter, two-way portal to another plane of existence opens in an unoccupied space within 30 feet of you and remains open until the end of your
Monsters
Mordenkainen Presents: Monsters of the Multiverse
this manner.
Legendary Resistance (3/Day). If the elder brain fails a saving throw, it can choose to succeed instead.
Magic Resistance. The elder brain has advantage on saving throws against spells
Creature Sense. The elder brain is aware of the presence of creatures within 5 miles of it that have an Intelligence score of 4 or higher. It knows the distance and direction to each creature, as
Monsters
Mordenkainen Presents: Monsters of the Multiverse
the colony.
This process doesn’t work on the brain of an ulitharid that dies a natural death, as such brains are too decrepit to be used. Instead, each ulitharid carries a psionically enhanced
in this manner.
Magic Resistance. The ulitharid has advantage on saving throws against spells and other magical effects.
Psionic Hub. If an elder brain establishes a psychic link with the ulitharid
Monsters
Phandelver and Below: The Shattered Obelisk
Legendary Resistance (2/Day). When Ruxithid fails a saving throw, he can choose to succeed instead.
Mental Fortitude. Ruxithid has advantage on saving throws against the charmed and frightened
mind flayers, who he believes are gods.PsychicBrain Tendrils (Recharge 5–6);{"diceNotation":"1d6", "rollType":"recharge", "rollAction":"Brain Tendrils"}. Ruxithid unleashes a flurry of crystalline
Monsters
Phandelver and Below: The Shattered Obelisk
starless depths and been subsequently rewarded with extraordinary powers.
Instead of heeding an elder brain, a mind flayer clairvoyant listens to the whispers and whims of the voices of the Far Realm. In
Legendary Resistance (3/Day). If the mind flayer fails a saving throw, it can choose to succeed instead.
Magic Resistance. The mind flayer has advantage on saving throws against spells and other
Monsters
Monstrous Compendium Vol. 1: Spelljammer Creatures
.
Legendary Resistance (3/Day). If the spider fails a saving throw, it can choose to succeed instead.
Unusual Nature. The spider doesn’t require air.Multiattack. The spider makes two Web Strand attacks
full-grown specimen has a body 30 feet in diameter and legs that are at least 30 feet long. When it wraps its legs tightly around its body and closes its eyes, the asteroid spider resembles nothing so
Monsters
Fizban's Treasury of Dragons
Legendary Resistance (4/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Siege Monster. The dragon deals double damage to objects and structures.
Unusual Nature. The
available to those who must contend with a mind flayer colony is the limit of its reach, which spreads only as far as the influence of the colony’s elder brain. But this small solace withers
Monsters
Phandelver and Below: The Shattered Obelisk
Legendary Resistance (3/Day). If the cluster fails a saving throw, it can choose to succeed instead.
Magic Resistance. The cluster has advantage on saving throws against spells and other magical
the attacker, it then makes one Slam attack against that attacker.An encephalon cluster pays no heed to an elder brain or its mind flayer progenitors. This grotesque creature shambles through dark
Monsters
Phandelver and Below: The Shattered Obelisk
":"Incorporeal Movement", "rollDamageType":"force"} force damage if it ends its turn inside an object.
Legendary Resistance (5/Day). If the refraction fails a saving throw, it can choose to succeed instead
-Brain. When Ilsensine left the Far Realm to establish a divine domain elsewhere, pieces of the God-Brain sloughed away and awoke to sentience. This is Ilvaash, the Dissonant Psyche.
The refraction of
Monsters
Van Richten’s Guide to Ravenloft
psychic damage dies.When the mind flayers of Bluetspur (see chapter 3) could find no cure for their overlord’s affliction, their degenerating elder brain turned to radical methods to stave off
the cerebral fluids from sapient minds. After doing so, they return to the Elder Brain of Bluetspur, which liquefies them into its pool and releases their stolen essences amid a hormone brine. This
Monsters
Phandelver and Below: The Shattered Obelisk
Far Realm, the eggs within an encephalon cluster no longer hatch into illithid tadpoles. Instead, when one of an encephalon cluster’s eggs reaches maturity, it is ejected from the mass as an
chance to mutate into what is known as an encephalon cluster—a ravenous, slimy, psionic, brain-shaped mass that spawns horrors called encephalon gemmules.PsychicLeech. The gemmule targets one
Monsters
Eberron: Rising from the Last War
instead.
Magic Resistance. Dyrrn has advantage on saving throws against spells and other magical effects.
Regeneration. Dyrrn regains 20 hit points at the start of its turn. If Dyrrn takes radiant
teleport up to 30 feet to an unoccupied space it can see.Multiattack. Dyrrn makes one Tentacle Whip attack and uses its Corruption once. Dyrrn can replace its Tentacle Whip attack with Extract Brain if it
Monsters
Mordenkainen Presents: Monsters of the Multiverse
pursue arcane magic are exiled as deviants, and for them no everlasting communion with an elder brain is possible. The road to lichdom offers an alternative way to escape the permanency of death, but
such forbidden texts can be hidden from other illithids and even from an elder brain. Yet eventually, mind flayer arcanist;mind flayer arcanists determined to pursue wizardry must flee the colony for
Monsters
Mordenkainen Presents: Monsters of the Multiverse
opportunity attack;opportunity attacks when it flies out of an enemy’s reach.
Legendary Resistance (3/Day). If the tempest fails a saving throw, it can choose to succeed instead.
Living Storm. The
tempest is always at the center of a storm 1d6 + 4;{"diceNotation":"1d6+4","rollType":"roll","rollAction":"Living Storm"} miles in diameter. Heavy precipitation in the form of either rain or snow
Monsters
Mordenkainen Presents: Monsters of the Multiverse
diameter with a ceiling 100 feet high. Like a stomach, it contains the remains of past meals. The dreadnought can’t be harmed from within the demiplane. If the dreadnought dies, the demiplane
choose to succeed instead.
Sever Silver Cord. If the dreadnought scores a critical hit against a creature traveling by means of the astral projection spell, the dreadnought can cut the target’s
Monsters
Spelljammer: Adventures in Space
Legendary Resistance (2/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Tunneler. The dragon can burrow through solid rock at half its burrowing speed and leaves a 15
-foot-diameter tunnel in its wake.
Unusual Nature. The dragon doesn’t require air.Multiattack. The dragon makes one Bite attack and two Claw attacks.
Bite. Melee Weapon Attack: +11;{"diceNotation
Monsters
Spelljammer: Adventures in Space
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Tunneler. The dragon can burrow through solid rock at half its burrowing speed and leaves a 20
-foot-diameter tunnel in its wake.
Unusual Nature. The dragon doesn’t require air.Multiattack. The dragon makes one Bite attack and two Claw attacks.
Bite. Melee Weapon Attack: +14;{"diceNotation
Monsters
Mordenkainen Presents: Monsters of the Multiverse
Legendary Resistance (3/Day). If Zuggtmoy fails a saving throw, she can choose to succeed instead.
Magic Resistance. Zuggtmoy has advantage on saving throws against spells and other magical
within the lair. They vanish after 1 hour.
Unleash Spores. Zuggtmoy uses either her Infestation Spores or her Mind Control Spores, centered on a mushroom or other fungus within her lair, instead of on
Monsters
Icewind Dale: Rime of the Frostmaiden
to succeed instead.
Magic Resistance. Auril has advantage on saving throws against spells and other magical effects.
Unusual Nature. Auril doesn’t require air, food, drink, or
the effect on itself on a success.Third Form
Auril’s third form, called Winter’s Womb or the Queen of Frozen Tears by her most ardent followers, is a 3-foot-diameter ice diamond containing
Monsters
Mordenkainen Presents: Monsters of the Multiverse
.
Legendary Resistance (3/Day). If Juiblex fails a saving throw, it can choose to succeed instead.
Magic Resistance. Juiblex has advantage on saving throws against spells and other magical effects
, this creature can move up to 20 feet through spaces no more than an inch in diameter. It must end this movement in a space that can accommodate its full size. Otherwise, it takes 5 force damage and
Monsters
Mordenkainen Presents: Monsters of the Multiverse
Legendary Resistance (3/Day). If Yeenoghu fails a saving throw, he can choose to succeed instead.
Magic Resistance. Yeenoghu has advantage on saving throws against spells and other magical
. Yeenoghu causes an iron spike—5 feet tall and 1 inch in diameter—to burst from the ground at a point he can see within 100 feet of him. Any creature in the space where the spike emerges
Yeenoghu
Legacy
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Monsters
Out of the Abyss
choose to succeed instead.
Magic Resistance. Yeenoghu has advantage on saving throws against spells and other magical effects.
Magic Weapons. Yeenoghu’s weapon attacks are magical.
Rampage
same effect two rounds in a row.
Yeenoghu causes an iron spike—5 feet tall and 1 inch in diameter—to burst from the ground at a point he can see within 100 feet of him. Any creature in
Monsters
Waterdeep: Dungeon of the Mad Mage
/Day). If Halaster fails a saving throw, he can choose to succeed instead.
Rejuvenation. If Halaster dies in Undermountain, he revives after 1d10 days, with all his hit points and any missing body
ghostly, 1-foot-diameter humanoid eye surrounded by motes of light. The sensor is stationary, though Halaster can reorient the eye to face in any direction. Halaster can see through the eye as though he
Monsters
Princes of the Apocalypse
succeed instead.
Innate Spellcasting. Imix’s innate spellcasting ability is Charisma (spell save DC 20, +12;{"diceNotation":"1d20+12","rollType":"to hit","rollAction":"Innate Spellcasting"} to
feet in diameter, and hurls globs of lava up to 200 feet away. Each character within this area must succeed on a DC 21 Dexterity saving throw or take 11 (2d10);{"diceNotation":"2d10","rollType":"damage
Magic Items
Tasha’s Cauldron of Everything
1 balor and 1 pit fiend appear. At the DM’s discretion, a portal opens into the presence of an archdevil or demon lord instead, then closes after 5 minutes.
91–00
Iggwilv’s
inverting and exploding into a 50-foot-diameter portal. This portal functions as a permanent gate spell cast by Iggwilv. The gate then, once per round on initiative count 20, audibly speaks a fiend&rsquo
Monsters
Fizban's Treasury of Dragons
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Spider Climb. The dragon can climb difficult surfaces, including upside down on ceilings, without
needing to make an ability check.
Tunneler. The dragon can burrow through solid rock at half its burrowing speed and can leave a 20-foot-diameter tunnel in its wake.Multiattack. The dragon makes one
Monsters
Fizban's Treasury of Dragons
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Spider Climb. The dragon can climb difficult surfaces, including upside down on ceilings, without
needing to make an ability check.
Tunneler. The dragon can burrow through solid rock at half its burrowing speed and can leave a 10-foot-diameter tunnel in its wake.Multiattack. The dragon makes one
Monsters
Fizban's Treasury of Dragons
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Shift Perception (1/Day). The dragon can cast hallucinatory terrain, requiring no spell components
and using Intelligence as the spellcasting ability (spell save DC 17).
Tunneler. The dragon can burrow through solid rock at half its burrowing speed and can leave a 15-foot-diameter tunnel in its
Monsters
Fizban's Treasury of Dragons
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.
Tunneler. The dragon can burrow through solid rock at half its burrowing speed and can leave a 20
-foot-diameter tunnel in its wake.
Warp Perception (1/Day). The dragon can cast mirage arcane, requiring no spell components and using Intelligence as the spellcasting ability.Multiattack. The dragon
Elder Brain
Legacy
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Monsters
Volo's Guide to Monsters
:
At will: detect thoughts, levitate
1/day each: dominate monster, plane shift (self only)
Legendary Resistance (3/Day). If the elder brain fails a saving throw, it can choose to succeed instead
Creature Sense. The elder brain is aware of the presence of creatures within 5 miles of it that have an Intelligence score of 4 or higher. It knows the distance and direction to each creature, as
Blue Slaad (control gem variant)
Legacy
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Monsters
Monster Manual (2014)
point.
Control Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled.
Certain spells can be used to
acquire the gem. If the slaad fails its saving throw against imprisonment, the spell can transfer the gem to the spellcaster's open hand, instead of imprisoning the slaad. A wish spell, if cast in
Mind Flayer Lich (Illithilich)
Legacy
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Monsters
Volo's Guide to Monsters
Legendary Resistance (3/Day). If the lich fails a saving throw, it can choose to succeed instead.
Rejuvenation. If it has a phylactery, a destroyed lich gains a new body in 1d10;{"diceNotation
ends.
Extract Brain. Melee Weapon Attack: +12;{"diceNotation":"1d20+12","rollType":"to hit","rollAction":"Extract Brain"} to hit, reach 5 ft., one incapacitated humanoid grappled by the lich. Hit: 55
Red Slaad (control gem variant)
Legacy
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Monsters
Monster Manual (2014)
point.
Control Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled.
Certain spells can be used to
acquire the gem. If the slaad fails its saving throw against imprisonment, the spell can transfer the gem to the spellcaster's open hand, instead of imprisoning the slaad. A wish spell, if cast in
Gray Slaad (control gem variant)
Legacy
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Monsters
Monster Manual (2014)
.
Regeneration. The slaad regains 10 hit points at the start of its turn if it has at least 1 hit point.
Control Gem. Implanted in the slaad’s brain is a magic control gem. The slaad must obey
transfer the gem to the spellcaster’s open hand, instead of imprisoning the slaad. A wish spell, if cast in the slaad’s presence, can be worded to acquire the gem.
A greater restoration spell
Death Slaad (control gem variant)
Legacy
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Monsters
Monster Manual (2014)
Gem. Implanted in the slaad's brain is a magic control gem. The slaad must obey whoever possesses the gem and is immune to being charmed while so controlled.
Certain spells can be used to acquire the
gem. If the slaad fails its saving throw against imprisonment, the spell can transfer the gem to the spellcaster's open hand, instead of imprisoning the slaad. A wish spell, if cast in the slaad's






