Detect Illithid

This uniquely githyanki spell alerts the caster to the presence of illithids within 100 feet of his person. The exact number of mind flayers and their positions are known to him if they are within the radius.

This spell was developed to aid illithid-hunting githyanki as they navigate the underground tunnels where the mind flayers make their lairs. Although its area of effect is small, its duration makes it a worthwhile spell. However, this spell is blocked by one foot of solid stone, one yard of wood or loose earth, or one inch of solid metal. The material component is a bit of illithid flesh or bone.