Arena Battles pit you against other players. To prepare, continue playing in the single player campaign to will increase your character's ranking and recruit better and more cards. When you are ready for to participate in an Arena Battle, bring the best cards (both rarity and performance) from the amount that you have obtained in single player. Do not be concerned about their level, as all creatures will be set to level twenty five. Spend Gems and get a good Hero. Use cards in battle to get their Hero cards to get the advantage.
Attacking
Use all your energy points when attacking to get the most out of your action cards and Drag Attacks. Consider calculating all the points that are needed and use them all before ending your turn. However, sometimes, it is better to wait for the best time to use a card to get its maximum effect. Select a target and focus on it until it is destroyed. Examine the creatures' stats and prioritize which ones to eliminate. Consider taking out Utilities first, followed by Red attacking cards if they are in play. Balance between Drag Attacks and using cards in your deck to fill your hero's energy meter. Then, use Hero Cards when their effect is at maximum.
Dragon Stones
Complete the Global Missions and the Daily Missions to get Dragon Stones as rewards. When you have enough Dragon Stones, you can try to win a premium card.
Helper creatures
Add Helper creatures to your deck. They will not count as lost creatures. If they die, your star rating will not decrease.
Rare creatures
There are a few ways to improve your chances of getting a rare creature. Save Gems to purchase new Creature Eggs. You will be guaranteed at least a three-star creature. Spend Dragon Fangs on the "Shallow" egg category. However, the maximum rarity available is is a three-star creature, with mostly poor ones otherwise. Participate in the limited time events to get the chance to win prizes that include rare creatures. Log in regularly to claim rewards awarded for frequent game play. Level your creatures to their maximum level first, then Evolve them to get a better star version.
Upgrades
After a few battles, level up your creatures. Determine which ones are better, in terms of stats and actual cards. Begin leveling up your most useful creatures to make them more competitive. Several very useful leveled up cards are much better than many cards that are rarely used. Try to use creatures from the same class when leveling them up.