The owner chooses his opponent's "base" by placing a block with the "home" sign on a map of Japan, which represents the playing field; when a player loses a game of Dragon Block, the area marked by the sign suffers a natural disaster. When Yugi Mutou and Imori played, Imori chose various places in Japan as Yugi's bases, as Imori was pushed around ever since he came to Tokyo; Yugi, on the other hand, placed Imori's bases in the sea to prevent damage.
Each player draws 6 blocks and places them in a horizontal line known as a stack, with the sides displaying the Chinese characters facing the blocks' respective owners. Each player draws one block each turn, and chooses to either discard it or another block. The Chinese character on each block identifies the element of the dragon; a player requires three blocks with the same element to summon a dragon.
A player that gets enough blocks to summon a dragon can declare their summons (without revealing their elements), with a maximum of two summons possible; they must then wait until their opponent has gathered theirs. Once both players have summoned their dragons, they place their blocks on the field with the characters facing up.
The players then use their dragons to battle. Each element has advantages and disadvantages against other elements:
The player who defeats their opponent's dragons wins.
- Yu-Gi-Oh! (Toei) episode 01818: "In a Forbidden Game - Show Your Hand"