A 30-minute long Village Guard will automatically be awarded after every defense with at least 1 building destroyed but does not result in a Shield, or if the player waits out 6 minutes of a personal break without defending. This will also extend the personal break timer by 30 minutes.
Village Guard is intended to support active play time, while a Shield is intended to provide opportunities for downtime from the game.
For example, if you need a 15-minute break or a 90-minute break, or if you want to boost your Barracks and have an intense 1-hour play session of constant attacking, the Village Guard can be used to make sure you don't get attacked in the middle of it, even if you get distracted for a while or accidentally go offline.
Think of the Village Guard like giving your device to your little brother to keep you online therefore, the time you spend on guard still counts towards the personal break time. If you ever need to step away from your device for a small period of time, the Village Guard stands ready to watch over things until you get back, even if you close the game.
The PBT is automatically reset when you receive a shield.
Staying offline for 15 minutes without getting attacked will fully reset the PBT.
Buying the 2-hour Village Guard will extend the PBT by 2 hours.
This holds true when being attacked, for example, receiving a 30-minute Village Guard will extend the PBT by 30 minutes.
During the 6-minute PB, if you don't get attacked or get attacked but didn't get a shield, you will be granted a 30-minute Village Guard along with a 30-minute extension to the PBT regardless of the league you are in.
After 30 minutes, you will be forced again to another 6-minute PB. During the 6 minutes, if you don't get a shield, you will be granted a 30-minute Village Guard + 30-minute extension to the PBT.
Again, after 30 minutes, you will be kicked out again for PB. However this is the last one, regardless if you get a shield or not, your PBT will be reset and granted a Village Guard depending on your current league.