before both days continues rating

Sammaster (Lich Form)

Monsters Forgotten Realms: Adventures in Faerûn

to dust. After 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Soul Gem"} days, he appears in the space of his soul gem, using the Sammaster (Dracolich Form) stat block. The gem is a

. He drew on the warped resurrection of dracoliches to become a lich himself. He continues to lead the Cult of the Dragon from the shadows, developing new ways to control and corrupt dragonkind

Sammaster (Dracolich Form)

Monsters Forgotten Realms: Adventures in Faerûn

until he is reduced to 0 Hit Points. If Sammaster is reduced to 0 Hit Points, his dracolich form dissolves to dust. After 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Soul Gem"} days

for his demise. He drew on the warped resurrection of dracoliches to become a lich himself. He continues to lead the Cult of the Dragon from the shadows, developing new ways to control and corrupt

Crown of Horns

Magic Items Forgotten Realms: Adventures in Faerûn

dying essence. Myrkul has since returned to become one of the Dead Three, and the Crown of Horns continues to further his gruesome will by seeking out mortal agents and gradually transforming them into

the course of 365 days. During that time, the transformation is purely cosmetic; these cosmetic changes slowly fade if you end Attunement to the crown before completing the transformation. When the

Summon Greater Demon

Spells Xanathar's Guide to Everything

You utter foul words, summoning one demon from the chaos of the Abyss. You choose the demon’s type, which must be one of challenge rating 5 or lower, such as a shadow demon or a barlgura. The

throw if you say its true name. On a failed save, the demon continues to obey you. On a successful save, your control of the demon ends for the rest of the duration, and the demon spends its turns

Lich Legacy

Monsters Basic Rules (2014)

":"1d10","rollType":"roll","rollAction":"Days"} days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery. Spellcasting. The lich is an 18th-level

, emerging to destroy those who dare to disturb the lich’s work. A lich encountered in its lair has a challenge rating of 22 (41,000 XP). Lair Actions On initiative count 20 (losing initiative

Killmoulis

Monsters Mordenkainen's Fiendish Folio Volume 1

sore and cramped, as rocks or sharp sticks somehow end up under their bedrolls. Once a killmoulis is angered, it continues to tail a group and visit its curse upon them. Only an offering of fine food

and an earnest apology can sooth an angry killmoulis. Without that, these creatures hold a grudge against a group's rude behavior that can last for days.

Scion of Skoraeus

Monsters Bigby Presents: Glory of the Giants

inside it awakens. At nearly 70 feet tall, it towers over most other creatures and wields a mass of crystal as a club. Once awakened, the scion continues to pursue the art that ornamented its dreams

":"1d10", "rollType":"roll", "rollAction":"Days"} days. Scions of Giants’ Gods Giants are descended from the All-Father, Annam, and his children. But scions of giants’ gods boast a greater

Draconic Shard

Monsters Fizban's Treasury of Dragons

":"Days"} days, the gemstone dissipates and the shard re-forms, regaining all its hit points and appearing in the place the gemstone once occupied or in the nearest unoccupied space. Unusual Nature

. In this vessel, a draconic shard continues to pursue the interests and struggles that drove the dragon, perhaps even accompanying adventurers in the guise of an intelligent magic item and steering

Beholder Legacy

Monsters Monster Manual (2014)

closing to melee range. A beholder encountered in its lair has a challenge rating of 14 (11,500 XP). Lair Actions When fighting inside its lair, a beholder can invoke the ambient magic to take lair

natural surfaces and to nonmagical objects that aren’t on anyone’s person. If the beholder dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollAction":"Days","rollType":"roll"} days.

Ancient Green Dragon Legacy

Monsters Basic Rules (2014)

continues down its spine, reaching full height just behind the skull.The forest-loving green dragons sometimes compete for territory with black dragons in marshy woods and with white dragons in subarctic

1d10;{"diceNotation":"1d10","rollType":"roll"} days, they become mundane plants and normal difficult terrain, losing their thorns.Poison

Riverine

Monsters Journeys through the Radiant Citadel

along the river’s path—such as its source or a significant waterfall—can also be used as lairs by a riverine. A riverine encountered in its lair has a challenge rating of 13 (10,000 XP

, the flora and fauna return to normal levels, and its river dries out over the course of 1d10;{"diceNotation":"1d10","rollType":"roll","rollAction":"Regional Effect Fade Days"} days. All other effects

Cradle of the Stone Scion

Monsters Bigby Presents: Glory of the Giants

scion continues to pursue the art that ornamented its dreams, seeking to mold and shape stone into beautiful elegance. If it needs more raw materials, the scion can transform a living creature in its

minerals, and existing moss dies within 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days. Scions of Giants’ Gods Giants are descended from the All-Father, Annam, and

Ancient Brass Dragon Legacy

Monsters Basic Rules (2014)

damage or someone uses an action to wake it. Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its true form. It

presence and location. If the dragon dies, the tracks fade in 1d10;{"diceNotation":"1d10","rollType":"roll"} days, but the other effects fade immediately.Fire

Adult Silver Dragon Legacy

Monsters Basic Rules (2014)

turns, ending the effect on itself on a success. Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its true form

its allies. Such creatures descend at a rate of 60 feet per round and take no falling damage. Given days or longer to work, the dragon can make clouds and fog within its lair as solid as stone, forming

Ambitious Assassin

Monsters The Book of Many Things

;s a hidden thieves’ guildhall or a lavish manse. The lair is filled with clever defenses to disorient, weaken, and kill intruders. The villain’s challenge rating increases while the

to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Enchanting Infiltrator

Monsters The Book of Many Things

’s a hidden thieves’ guildhall or a lavish manse. The lair is filled with clever defenses to disorient, weaken, and kill intruders. The villain’s challenge rating increases while the

resistance to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Ancient Silver Dragon Legacy

Monsters Basic Rules (2014)

of its turns, ending the effect on itself on a success. Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its

’s or its allies. Such creatures descend at a rate of 60 feet per round and take no falling damage. Given days or longer to work, the dragon can make clouds and fog within its lair as solid as stone

Adult Amethyst Dragon

Monsters Fizban's Treasury of Dragons

object dropped down one of the chimneys continues falling endlessly unless it or some outside force has the means to slow or stop it. This property of the lair vanishes after 1d10;{"diceNotation":"1d10

","rollType":"roll","rollAction":"Days"} days if the dragon dies. Upper Caves. The dragon most often sleeps in the largest upper chamber of the lair. The dragon’s hoard is divided between that

Adult Time Dragon

Monsters Planescape: Adventures in the Multiverse

their utmost to preserve these historical sites. A time dragon’s insatiable desire for knowledge means it’s likely to have more than one such lair. The challenge rating of an ancient time

(your choice). Timelessness. Beasts, Humanoids, and Plants within 3 miles of the lair age only 1 year for every 10 years that pass. If the dragon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Ancient Amethyst Dragon

Monsters Fizban's Treasury of Dragons

the lower level brings a creature to the upper level. A creature or object dropped down one of the chimneys continues falling endlessly unless it or some outside force has the means to slow or stop it

. This property of the lair vanishes after 1d10;{"diceNotation":"1d10","rollType":"roll","rollAction":"Days"} days if the dragon dies. Upper Caves. The dragon most often sleeps in the largest upper

Adult Green Dragon Legacy

Monsters Basic Rules (2014)

treacherous of true dragons, green dragons use misdirection and trickery to get the upper hand against their enemies. A green dragon is recognized by the crest that begins near its eyes and continues down

;{"diceNotation":"1d10","rollType":"roll"} days, they become mundane plants and normal difficult terrain, losing their thorns.Poison

Death Tyrant Legacy

Monsters Monster Manual (2014)

it contains more trappings of death and decay. A death tyrant encountered in its lair has a challenge rating of 15 (13,000 XP). Lair Actions When fighting inside its lair, a death tyrant can invoke

’s lair, roll a d20 for that creature. On a roll of 10 or lower, the creature is subjected to one random eye ray of the tyrant. If the death tyrant dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollAction":"Days","rollType":"roll"} days.Poison

Ancient Copper Dragon Legacy

Monsters Basic Rules (2014)

at the end of each of its turns, ending the effect on itself with a successful save. Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than

giggling. Even serious matters suddenly seem amusing. If the dragon dies, the magic carvings fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. The other effects end immediately.Acid

Imix

Monsters Princes of the Apocalypse

location. At first, effects are minor — grass turns brown, animals become listless, work and travel become very tiring. The longer Imix remains, the worse the heat becomes; after 5 days, crops

die and ponds dry up; after 10 days, unprotected livestock dies, and wells and small rivers dry up; after 20 days, large lakes and rivers are reduced in depth by 20 feet and shrink accordingly

Ancient Time Dragon

Monsters Planescape: Adventures in the Multiverse

challenge rating of an ancient or adult time dragon;adult time dragon increases by 1 when it’s encountered in its lair. Lair Actions On initiative count 20 (losing initiative ties), the

area take 10 minutes or 2 hours (your choice). Timelessness. Beasts, Humanoids, and Plants within 3 miles of the lair age only 1 year for every 10 years that pass. If the dragon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.

Valindra Shadowmantle Legacy

Monsters Tomb of Annihilation

;{"diceNotation":"1d10","rollType":"roll","rollAction":"Rejuvenation"} days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery. Spellcasting

the lich’s work. A lich encountered in its lair has a challenge rating of 22 (41,000 XP). Lair Actions On initiative count 20 (losing initiative ties), the lich can take a lair action to cause

Otherworldly Corrupter

Monsters The Book of Many Things

kill intruders. The villain’s challenge rating increases while the villain is in this lair: Otherworldly Corrupter. Challenge 18 (20,000 XP) Lair Actions On initiative count 20 (losing

":"roll", "rollAction":"Days"} days.PsychicChange Shape. The corrupter magically transforms into any creature that is Small or Medium, while retaining its game statistics (other than its size). This transformation ends if the corrupter is reduced to 0 hit points or uses a bonus action to end it.

Yeenoghu

Monsters Mordenkainen Presents: Monsters of the Multiverse

), and there are few structures or signs of civilization on his layer of the Abyss. The challenge rating of Yeenoghu is 25 (75,000 XP) when he’s encountered in his lair. Lair Actions On

Yeenoghu dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days. Cultists of Yeenoghu Yeenoghu grants special abilities to his cultists. His

Arcturia

Monsters Waterdeep: Dungeon of the Mad Mage

":"1d10","rollType":"roll","rollAction":"Rejuvenation"} days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery. Spellcasting. The lich is an 18th

recesses, emerging to destroy those who dare to disturb the lich’s work. A lich encountered in its lair has a challenge rating of 22 (41,000 XP). Lair Actions On initiative count 20 (losing

Lorthuun

Monsters Out of the Abyss

lair has a challenge rating of 14 (11,500 XP). Lair Actions When fighting inside its lair, a beholder can invoke the ambient magic to take lair actions. On initiative count 20 (losing initiative

before, harmless slime might coat a statue, and so on. These effects apply only to natural surfaces and to nonmagical objects that aren't on anyone's person. If the beholder dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days.

Exethanter

Monsters Curse of Strahd

":"1d10","rollType":"roll","rollAction":"Rejuvenation"} days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery. Spellcasting. Exethanter is an

its lair has a challenge rating of 22 (41,000 XP). Lair Actions On initiative count 20 (losing initiative ties), Exethanter can take a lair action to cause one of the following magical effects

Stalagma Steelshadow

Monsters Waterdeep: Dungeon of the Mad Mage

each of its turns, ending the effect on itself on a success. Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into

60 feet per round and take no falling damage. Given days or longer to work, the dragon can make clouds and fog within its lair as solid as stone, forming structures and other objects as it wishes

Veiled Presence

Monsters The Book of Many Things

filled with clever defenses to disorient, weaken, and kill intruders. The villain’s challenge rating increases while the villain is in this lair: Veiled Presence. Challenge 22 (41,000 XP

members of the villain’s organization deal poison damage while within 3 miles of the lair, they ignore the target’s resistance to poison damage. If the villain dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.Necrotic, Radiant

Demilich (Variant) Legacy

Monsters Monster Manual (2014)

be permanently destroyed. Its skull reforms after 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Enduring Existence"} days, restoring the creature to its wretched state. If it has the

lair has a challenge rating of 23 (50,000 XP). Lair Actions On initiative count 20 (losing initiative ties), the demilich rolls a d20;{"diceNotation":"1d20","rollType":"roll","rollAction":"Take Lair

Fraz-Urb'luu Legacy

Monsters Out of the Abyss

hooks. Corkscrew towers loom above twisted domes and vast amphitheaters, just a few examples of the impossible architecture that fills the city. The challenge rating of Fraz-Urb’luu is 24

’luu dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Fraz-Urb’luu If a creature goes mad in Fraz-Urb’luu’s lair or

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