course were remain

Derwyth

Monsters Quests from the Infinite Staircase

Tree Shape (2/Day). Over the course of 1 minute, Derwyth can magically transform into a Huge or smaller tree and remain in that form for 24 hours or until she ends this transformation early (no

Carrion Stalker

Monsters Van Richten’s Guide to Ravenloft

instantly kills the larvae in the creature, ending the effect on it. If a creature is reduced to 0 hit points by the infestation, it dies. The larvae remain in the corpse, and one survives to become a fully

kills the larvae.A carrion stalker begins life as a pale larva that infests a corpse. Over the course of weeks, this grub burrows, feeds, and grows, ultimately developing into a chitinous mass of pincers

Riverine

Monsters Journeys through the Radiant Citadel

lair. The tracks lead to potential shelters and safe passages across the river’s waters, while also leading away from areas that the riverine prefers to remain undisturbed. If the riverine dies

, 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

Geryon

Monsters Mordenkainen Presents: Monsters of the Multiverse

traveler somewhere in Stygia. If Geryon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Cultists of Geryon Geryon grants his cultists special

; (see the Monster Manual) to appear in unoccupied spaces of his choice within 600 feet of him. The minotaurs roll initiative when they appear, and they obey his commands. They remain until they die

Orcus Legacy

Monsters Out of the Abyss

. Master of Undeath. When Orcus casts animate dead or create undead, he chooses the level at which the spell is cast, and the creatures created by the spells remain under his control indefinitely

again for 24 hours. If Orcus dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Madness of Orcus If a creature goes mad in Orcus’s lair or

Valin Sarnaster

Monsters Candlekeep Mysteries

, petrified, knocked prone, restrained, or stunned. Equipment worn or carried by Valin remain in her possession.Valin Sarnaster has been thoroughly corrupted by visions of a future in which she sees herself

as the immortal heir of Savras’s realm. The Canopic Being came into her possession years ago, and an obsession with the dark rituals therein set the oracle on her present course. Valin has

Orcus

Monsters Mordenkainen Presents: Monsters of the Multiverse

. Master of Undeath. Orcus can cast animate dead (at will) and create undead (3/day). He chooses the level at which the spells are cast, and the creatures created by them remain under his control

Undead mockeries of their former selves. Skeletal and zombie versions of local wildlife are commonly seen in the area. If Orcus dies, these effects fade over the course of 1d10;{"diceNotation":"1d10

Geryon (Variant)

Monsters Mordenkainen Presents: Monsters of the Multiverse

appear, and they obey his commands. They remain until they die or Geryon uses an action to dismiss any or all of them.Geryon can take 3 legendary actions, choosing from the options below. Only one

deposits a traveler somewhere in Stygia. If Geryon dies, these effects fade over the course of 1d10;{"diceNotation":"1d10","rollType":"roll"} days. Cultists of Geryon Geryon grants his cultists special

Hierophant Medusa

Monsters The Book of Many Things

a surface such as a ceiling with no way to remain there (for example, sufficient handholds), it falls at the end of this movement. Regional Effects The region containing a medusa’s lair is

relevant to the medusa’s divine purpose. If the medusa dies, these effects fade over the course of 1d10;{"diceNotation":"1d10", "rollType":"roll", "rollAction":"Days"} days.PoisonPetrifying Gaze

Ancient Deep Dragon