When played, this silent whistle has the power to reveal information about its surrounding area. Carved from the bone of a purple worm, it massively heightens all creatures' innate tremor sense. When played, the user must make a Wisdom Check. Their roll determines if they match the correct resonance required to reveal information. 

1-10: The layout of the next 50ft, not revealing any creatures. 

11-15: The layout of the next 100ft, not revealing any creatures. 

16-18: The layout of the next 100ft, revealing the location of any creatures within 50ft. 

19-20: The layout of the next 100ft, revealing the location of any creatures within 100ft. 

20+: The layout of the next 125ft, revealing the location of any creatures within 125ft.