Invisibility to animals, 10' radius

Invisibility to animals, 10' radius was a very rare spell used by druids.

Effects
When cast, this spell caused all creatures within a sphere to become completely invisible to animals, including giant animals. The invisible creatures were capable of walking past animals undetected, even able to pass through an animal. If one of the invisible creatures initiates an attack, the spell was broken for them only. The spell had no effect on animals with any magical abilities.

Components
In addition to a somatic component, this spell required a material component, holly.