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 draghearts. These new cards are put straight in the battle zone at the start of the game, instead of the hyperspatial zone, but after you set your 5 shields and draw 5 cards, you also put the top 6 cards of your deck under the two faced card, those 6 cards counting as seals. To flip the card, you have to put the 6 seals in your graveyard by fulfilling a certain condition, so far the only condition known being: "When you put a Command in the battle zone, remove 1 seal."

Apparently, the new two faced card and the Seals are not affected by card removal.