Does the term "Enemy Card" refer only to cards in the battlefield, or "any card controlled by an enemy player"?
"Enemy"
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Does the term "Enemy Card" refer only to cards in the battlefield, or "any card controlled by an enemy player"?
Rules, Glossary, Enemy: "'In a battle or attack, if you are the Defender or a defending ally, "enemy" describes a player who is the Attacker or an attacking ally, armies on the attacking side, and units or cards in units controlled by an attacking player. "
In battle or home, but they must be in units. (Corrected.)