Earth Cloak

Earth Cloak is a gem effect in Xenoblade Chronicles and Future Connected. It reduces the range at which grounded enemies can detect the user.

Overview
Cloak gems are good for sneaking around and trying to get places without being accosted, presumably by enemies too strong to fight (or too numerous to want to deal with). It's somewhat difficult to estimate their effect in the moment, but a decent gem makes a substantial difference in how close the enemy has to be before it can see/hear/sense the user. However, Earth Cloak does not work on flying or swimming enemies (they need Aerial Cloak or Aquatic Cloak).