Enchanted Cavern Locator

The Enchanted Cavern Locator spell is used to aid in finding the Enchanted Cavern, if there happens to be one nearby. Unlike most spells, this spell has no cost and has a negligible few seconds cooldown. When used, you'll be given a message, depending on how far away you are from the center of an Enchanted Cavern:
 * 1) 251+ blocks: There is no ancient cavern located nearby.
 * 2) 250-121 blocks: There is an ancient cavern a long ways away.
 * 3) 120-81 blocks: There is an ancient cavern a fair distance away.
 * 4) 80-41 blocks: There is an ancient cavern fairly close nearby. ***
 * 5) 40-21 blocks: There is an ancient cavern so closely nearby you can almost taste it...
 * 6) 0-20 blocks: You're inside an ancient cavern right now! Why are you using this spell?

*** ''NOTE: This is the closest message you'll get while on the surface. If you get it, dig down.''

Trivia
This spell was originally going to be a trinket named "divining rod", but it ended up being implemented as a spell instead.