You can buy banners with Banner tokens, that you will have hardly earned by participating in Guild Wars. You will be able to find them in your Guild Wars shop or from event chests.
Once you will have buy a banner, it will be kept in your inventory, and you will be able to activate it for your own character's benefice and progress. Here are some key points that will be useful for you to know:
- Banner tokens will be rewarded individually to each player who will have participated in the war.
- You will get Banner tokens even if your mercenary was used instead of your actual character during the war.
- The banners last for 24 hours after activation but be careful: some have a limited number of uses. You can usually find banners with either 1, 2, 4, 8, or 16 uses.
- Each type of banner can be declined in 4 colors: green, blue, purple, orange. Orange being the most powerful ones.
He are the different types of banners you can find in the game.