Cu dilis
Cú dílis is a fourth level conjuration with an instant casting time, a duration of eight hours, a range of thirty feet, and a material requirement of a silver whistle and piece of bone.
Cú dílis opens a door to the ethereal plane which allows a spectral creature to pass through. The beast is only visible to the caster and remains within thirty feet of where it entered. The animal can see that which is invisible, and if anyone other than the castor approaches, it will bellow an alarm. If the castor blows the whistle, the beast will attack everyone within thirty feet. The animal will dispel if the castor moves more than one hundred feet away or when dismissed.
The beings summoned by cú dílis are animal-like and vary in size but are all ferocious when provoked. They are not friendly as they do not tend to interact with the castor and never seem to be at ease. The creatures will permit the castor to approach and touch them but show no affection.
Cú dílis is used by the military as an invaluable defense. The use of the spell by civilians has been banned due to the unseen danger posed to those unaware of the conjured beast’s presence.