Slime

Where Earth meets Water and neither holds a shape. Slime is the plane of things becoming other things.

Gluurok holds it: the Primordial Slime, the Catalyst of Decay, whose portfolio is apathy, transformation and decay in that order. The healing ooze in the tincture trade, and the soul-goo beneath the Haudh-Gwenn keep, are not this plane’s substance. They are Mól alchemy.

Slime was among the planes marked in the Mól sigil-hall (S1E10).