The deck is where all the cards reside at the start of each battle. All cards in the deck are faced down. During the ready decrement phase mentioned in workflow, one card is drawn out of the deck to staging area. The reclaim ability can put cards from graveyard to deck. Animated does not interfere with the deck. There is no other way to restore cards back into this area. No spells or abilities can move or remove cards from the area. Once all the cards are drawn the deck does not draw card, but it resumes drawing once more cards come into the drawing area.
The drawing area is indicated as the covered card slot one the top left and bottom left of the game.