However, it was Monster Manual II (1983) that first began to organize the oozes.

New oozes began to proliferate as early as issue 5 of The Strategic Review (the precursor to Dragon magazine) in 1975, which featured the slithering tracker. Five of them appeared in original D&D in 1974: the black pudding, the gelatinous cube, the gray ooze, the green slime, and the ochre jelly. The oozes are one of the most iconic families of D&D monsters, highlighting the deadly environment of the dungeon crawls of the early game. Not only was Juiblex a “vast pool of slime”, he also had oozy servitors including black puddings, gray oozes, green slimes, and ochre jellies. There, he was described as “the Faceless Lord” and “the most disgusting and loathsome of all demons”-which is really saying something. Juiblex made his debut in AD&D’s Monster Manual in 1977.

It was high time that Juiblex got his due in a D&D adventure, since the loathsome Faceless Lord has long been one of the most evocative demon lords. The destructive conquest sought by Juiblex, the Lord of Slime, weaves its way through the Rage of Demons storyline and Out of the Abyss.

Ooze dungeons and dragons