In the Dungeons & Dragons fantasy role-playing game, an ooze is a type of creature. This category includes such monsters as slimes, jellies, deadly puddings and similar mindless, amorphous blobs. They can be used by Dungeon Masters as enemies or allies of the player characters.
Many oozes dwell underground, and most secrete an acid from their skin that dissolves flesh and other materials rapidly.
Oozes are essentially blind, but more than make up for that with an ability called "blindsight," which allows them to discern nearby objects and creatures without needing to see them visually.
"A mysterious being of unknown origin. Its body is a mass of pitch-black, viscous liquid. It swallows all creatures that draw near, growing ever bigger as it does. The Black Ooze is said to be the form of a demon who failed to achieve its true form and can no longer retain its shape."
—Shin Megami Tensei IMAGINE compendium
Black Ooze can be contracted during the day in Ueno and within Suginami Tunnels' silver-level instance. It acts as one of the three bosses in DB Watanabe and DB Saitou's hacked chip instances. A large nightmare variant can be encountered in the basement levels of Old Ichigaya Camp.
"A mass of malevolent intent and emotion that failed to become a true demon. All it does is eat prey and grow."
—Persona 5 background
Black Ooze is the fifth Persona of the Moon Arcana and can be found as a Shadow in Okumura's Palace and the Adyeshach area of Mementos, with the title "Pulsing Mud." It is the last of three Personas to learn the Headbutt skill and the first Persona to learn the Brain Jack skill. Black Ooze is the second of three Personas to learn Flash Bomb. When itemized through Electric Chair execution in the Velvet Room, Black Ooze yields a Stagnant Air skill card.
When encountered as a Shadow, Black Ooze will typically try to keep two of their kind on the battlefield at a time with their Summon skill in addition to using Famine's Scream to weaken the party's Physical attacks to further capitalize on their resistance to Physical and Gun damage. However, at low HP they may also choose to use their Self-destruct skill to damage everyone on the battlefield, which can lead to a chain reaction of Self-destructs which can damage the party heavily.
"An amorphous creature born from the evil and vile intent of a demon who failed to transform into its true form. It is simply an ever-growing black blob of viscous liquid that mindlessly devours everything in its path."