Gandalf encounters the Balrog in the under mountain Caves of Moria. The
result is a fantastic duel of their magical powers on a small bridge over a deep
chasm. In LOTR The Duel players replay that duel with the help
of cards, which have magical symbols on the left and right, representing the
strength of the adversaries. The symbols on the cards represent the offensive
(right) and defensive (left) strengths of the adversaries: each unblocked symbol
is lost energy for that player.