challenge to a duel

Exploration Stage: Room of Fate
From: Conductor
Description: You look good riding your warhorse, don't you? Now, you must proceed to the edge of the fog and challenge the assassin, a card cheater, to a duel. First, you must find the herald's trumpet.
Completed: According to the rules, the start of a duel must be announced by the herald. But since there is no herald here, you must designate a witness to blow the bugle yourself. You never know what kind of moves your opponent will make. There is no honor here. Stay close to the witness.