Amulet vs. Crystal Balls & ESP: The wearer of this item is automatically protected from being spied on by someone using a crystal ball or any type of ESP.
A few quick things to note.
- Protection is "automatic." Not a bonus to a save, not a contested roll. Not "when activated." Automatic. Which is par for the course with these types of items, but useful to keep in mind.
- Works vs. "any type" of ESP. This includes spells, items, and magical abilities.
Does "any type" of ESP include clairvoyance? Telepathy? That's probably a DM call.I would be inclined to say yes, but other DMs might feel differently.
Keep in mind that the amulet protects the wearer from this type of magical surveillance, but not the rest of the party. If the wearer is telling a party member the Big Plan, the other character's thoughts are ripe pickings.
Like a lot of miscellaneous magic items, I see this one as one the PCs would need to think outside the box a bit to get more than simply keeping it on all the time just in case some seer starts crystal gazing. While its utility in the dungeon may be limited, such items in a relatively high magic world might be high demand by merchants, diplomats, and the like. Alternatively, higher level "endgame" PCs might use it themselves in such situations.