This is a reincarnation of TCG "Duel Masters" with some minor changes in rules.
Each player has a deck full of creatures and spells. The goal of the game is to finish an opponent with one of your creature's attacks. However, each player is protected by 5 shields, represented by face-down cards from a player's own deck. When your creature attacks an opponent (and is not blocked by another creature) it breaks one of his shields, and the shield card goes to the owner's hand. When your creature attacks a defenseless opponent, you win the game.
The game has some similarities with the grandfather of collectible card games - Magic: the Gathering, which is also made by Wizards of the Coast. However, it has two major differences:
1. There is no distinct card class for producing mana. The same cards, representing creatures and spells, can produce mana if placed in the Mana Zone instead of the Battle Zone. This removes what many see as a major flaw of Magic: the Gathering - "mana flood" and "mana screw".
2. There are no instant spells or activated abilities. Therefore, there are far fewer surprises for players from their opponents and also fewer tactical decisions during play. On the other hand, it plays quicker and can be easier for children to learn and understand. Even so, it has strong strategic aspects and fun deck building.