This is basically a survival mode in which you pick your units before the match begins, those pop up right where you castle should be, and then you must fight the enemy player with your army.
In this mode you are given these choices on what you want:
What units are you taking with you into this ranked/unranked battle.
What upgrades do they start with.
And finally how many of said units?
NOW IN THIS MODE THERE IS NO STATUE, NO KINGDOM TO REBUILD OR UPGRADE UNITS, AND NO MINERS! In this mode basically you start out with the units and upgrades you bought before the match starts and they all basically start right where your castle should be.
Now for unit selection, it will run something like this:
In a large map you are given 5000 gold and 2000 mana to buy units and upgrades before the match starts.
In a medium map you are given 2000 gold and 1000 mana to buy units and upgrades before the match starts.
In a Small map you are given 1000 gold and 500 mana to buy units and upgrades before the match starts.
In this mode every unit counts and there is no pop cap.
HOW TO LOSE IN THIS MODE: lose all of your starting soldiers.
HOW TO WIN IN THIS MODE: kill all the enemy soldiers.
If more explanation is needed then please shout out.