AD&D

Priest spellLevel 5reversible

Transmute Rock to Mud

School
Alteration
Spheres
ElementalEarthWater
Range
160 yds.
Components
V / S / M
Duration
Special
Casting time
8
Area of effect
20-ft. cube/level
None
Source
PHB

Flavor

Solid rock to deep, sucking mud, miring whatever stands upon it.

Mechanics

. a volume of rock/earth (about a 20-ft. cube/) within range into deep mud; creatures sink and are slowed/trapped (size-dependent), and structures may collapse. Reverse (mud to rock) hardens mud to stone, potentially trapping those within. : clay and water (or sand, lime, water for reverse), plus the holy symbol.