Field Zone

Box number "1" is your Field Spell Card Zone. Only 1 Field Spell Card may be active at any time, and any new card that is activated here destroys one on the other side of the field, if present. You may not activate a Field Spell Card if there is one already present on your side of the field. You'd have to destroy the one already present on the field first, before playing your new one. A Field Spell Card may be also be Set here, instead of Activated. If it is Set, and there is already a Field Spell Card on your opponent's side of the field, that Field Spell Card is not destroyed.