Before you can get any victories you must learn to how handle the tools you will use in battle: the cards of your deck.
First of all you must know that there are four basic types of cards: the overlord, units, spells and artifacts.
The overlord represents yourself in the battlefield and determines your faction and what cards you can include in your deck. When the game starts your overlord will automatically appear in the battlefield. A good commander is always the first to arrive to battle to inspect the battlefield and to decide how to deploy the troops. Normally the overlord will be a powerful card in the battleground, but beware, because if he dies you will lose the game!
The minions are the troops you will invoke on your turn as the battle progresses. They represent the bulk of your army. All cards except the overlord have an invocation cost. This cost is paid using your remaining actions per turn. Everything costs actions: playing cards, moving units or attacking. Therefore, you must think very carefully how you will use your turn actions.
Minion cards also show the strength and life of units at the bottom of the card. When two units fight, the life of each unit will decrease depending on the strength of the attacker. You must carefully decide when it's time to attack and when it's time to retire.
In addition, cards might show at the bottom a text describing their special skills. It's crucial to use these skills wisely to stay ahead of your opponent in battle. Do not underestimate a seemingly simple skill or ability, since it’s effect could be greatly enhanced by combining it with other cards' skills. The art of choosing your minions and building your army is complex and fun.
Equipments, such as weapons, shields or magic rings, may be played on your units. Equipments will allow you to improve the characteristics of your units during the course of the battle. Some euipments (wapons and armors) can break when used, and a unit can only have one equipment at a time, so use them well.
It is also important to master the art of casting spells. Spells are not played as pawns in the battlefield, but their effect is applied immediately and then they disappear. There are a variety of numerous magic spells such as fireballs, healing rays or freezing clouds. Spells will be useful sometimes to get you out of trouble or as a support to your main strategy.
These are the tools that you, as an overlord, will use on the battlefield. You have lots of cards that you can use to create your army, so you must choose wisely what to recruit depending on your strategy.
I hope you've read these lessons carefully, as they will be very precious in the battlefield and determine the difference between victory or death.