Seal

Seal represents a new mechanic that will probably be introduced with DMR-19, along with a supposed new type of two-faced cards similar to Psychic Creatures and Dragheart cards.

Details
These new cards are put into Sealed Impulses, and when you put the Sealed Impulse into the Battle Zone, you put a varying amount of cards from the top of your deck onto the Impulse face down listed on the impulse. To flip the Impulse, you have to put all the seals into your graveyard by putting a Command that has the same civilization as the sealed card into the battle zone.

You can also seal your opponent's creatures. Your opponent's creatures are sealed by placing the top card of his deck onto them face down. When an opponent's creature is sealed, the sealed creature is not treated as a creature, does not leave the battle zone, cannot attack, cannot block and cannot activate any abilities listed on it as if the creature wasn't there. The seals can be removed by card removal, by putting commands that have the same civilization as the sealed card into the battle zone or by various card effects such as Liberation of the End.