Deep Magic Volume 2 (p.183)
Gnaw
0-level (Cantrip) Transmutation
Casting Time: 1 action
Range/Area: Touch
Components: Verbal, Somatic, Material
Materials: a rat's tooth
Duration: Instant
Damage/Effect: Utility
You touch a piece of wood, rope, cloth, thatch, or other organic material, and a hole appears through it up to 3 inches long and 1 inch in diameter, circumscribed with tooth marks as if chewed by rodents or other vermin. You can see through this hole normally and use line-of-sight spell effects to the other side. This spell can be used to cut any rope or snap any branch up to 2 inches thick. It has no effect on metal or stone objects.
Available for: Cleric, Druid