Detect Rakshasa

This spell takes ten minutes to cast. The caster must be undisturbed while it is being cast. If anyone touches the caster, or if the caster suffers damage, or if anyone attempts to cast another spell directly on the caster while this spell is being cast, the spell fails and the spell slot is lost.

Upon casting, you know if there is a rakshasa within 30 feet of you, as well as where the creature is located.