disease increases are behind

Wall of Ice

Spells Player’s Handbook

. Reducing a 10-foot section of wall to 0 Hit Points destroys it and leaves behind a sheet of frigid air in the space the wall occupied. A creature moving through the sheet of frigid air for the first time

appears increases by 2d6 and the damage from passing through the sheet of frigid air increases by 1d6 for each spell slot level above 6.

Book of Exalted Deeds

Magic Items Dungeon Master’s Guide

this damage disappears in a flash and is destroyed, leaving its possessions behind. The book then vanishes, and the creature’s Attunement to it ends. Benefits granted by the Book of Exalted Deeds

after you spend the requisite amount of time reading and studying the book. Divine Wisdom. After you spend the requisite amount of time reading and studying the book, your Wisdom increases by 2, to a

Moonblade

Magic Items Dungeon Master’s Guide

-75 When you hit with an attack roll using the Moonblade, you deal an extra 1d6 Force damage. Each time the weapon gains this property after the first, the extra damage increases by 1d6, to a maximum

cause the Moonblade to flash brightly. Each other creature that is within 30 feet of you and not behind Total Cover must succeed on a DC 15 Constitution saving throw or have the Blinded condition for 1

Vegepygmy

Monsters Mordenkainen Presents: Monsters of the Multiverse

from the remains left behind when a Humanoid or a Giant is killed by russet mold (see “Russet Mold” below). One or more vegepygmies emerge from the corpse a day later. Vegepygmies

poison or cures disease kills the infestation. A creature reduced to 0 hit points by the mold dies. If the dead creature is a Beast, a Giant, or a Humanoid, one or more vegepygmies emerge from its body 24

Vargouille

Monsters Mordenkainen Presents: Monsters of the Multiverse

of existence, such as Carceri, where they are a menace. Each vargouille carries a disease that creates more of its kind; a flock of vargouilles on the wing is a plague of chaos and evil. Swarms of

behind when one Fiend kills another. Because of their hunger for living prey, vargouilles are eager to escape the Lower Planes. On rare occasions, summoning a demon to another plane can bring a

Gorka Tharn

Monsters Waterdeep: Dungeon of the Mad Mage

. Enlarge (Recharges after a Short or Long Rest). For 1 minute, the mummy lord magically increases in size, along with anything it is wearing or carrying. While enlarged, the mummy lord is Large, doubles

Negative Energy (Costs 2 Actions). The mummy lord magically unleashes negative energy. Creatures within 60 feet of the mummy lord, including ones behind barriers and around corners, can't regain hit

Diderius

Monsters Tyranny of Dragons

(Costs 2 Actions). Diderius magically unleashes negative energy. Creatures within 60 feet of him, including ones behind barriers and around corners, can’t regain hit points until the end of his next

, as determined by the DM. If a divination spell already has a chance to fail or become unreliable when cast multiple times, that chance increases by 25 percent. A creature that takes treasure from the

Valin Sarnaster

Monsters Candlekeep Mysteries

energy. Creatures within 60 feet of Valin, including ones behind barriers and around corners, can’t regain hit points until the end of Valin’s next turn. Whirlwind of Sand (Costs 2 Actions

already has a chance to fail or become unreliable when cast multiple times, that chance increases by 25 percent. A creature that takes treasure from the lair is cursed until the treasure is returned. The

Luba's Tarokka of Souls

Magic Items Tasha’s Cauldron of Everything

deck, you can use an action to cast one of the following spells (save DC 18) from it: comprehend languages, detect evil and good, detect magic, detect poison and disease, locate object, or scrying

the mists, leaving behind only the Tarokka of Souls. It is said that if you draw the Mists card from it, you can hear the whispers of her kind voice.

Adult Amethyst Dragon