In War Dragons, one of the main focuses is breeding strong and powerful dragons. Each player will start on the RED TIER and slowly climb up to Verdant. As you go through the tiers, you will obtain stronger and more powerful dragons.
Dragons are breedable once they reach a certain level. You can tell which level your dragon must be in order to reach a breedable level. Once you get the dragons to breedable levels, you breed onto the next tier.
The easiest way to get dragons to level up is attacking bases. Each base will give you a certain amount of XP for you dragons. The first few attacks of the day will reward you x5 XP. There are some XP farms which are dedicated to people attacking for XP. These bases are usually empty and are easy.
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The easiest way to get egg tokens and fragments is to complete Egg Balloon Missions and participate in events. Egg tokens and fragments allow you to breed during the breeding events.