If you lose your lance, you can get another from any of the Lance Racks near the stables or in the Silver Covenant Pavilion.
Argent Champion defeated
Description
You are nearly ready to compete on behalf of <Capital City> in the grand melee. To prove yourself worthy to enter the lists on behalf of our city, you must defeat a champion of the Argent Crusade.
Go to the stables on the southern side of the grounds, equip a lance from the lance rack, and mount up. Speak to Squire Danny at the Argent Valiants' Ring on the western edge of the grounds. The squire will call out your opponent when you're ready.
After the battle is concluded, we will speak of the outcome.
Rewards
You will be awarded with one of the following achievements, based on the race you are working for (this will be your race the first time through):
You have proven yourself worthy of the title of champion, <name>. You will compete at the tournament's highest level on behalf of <Capital City>, riding in the grand melee with your weapon at the ready and our mighty pennant at your back.
After completing "The Valiant's Challenge", the following quests open up allowing players to repeat the valiant stage of daily quests (steps six and seven) for the other factions with which they have not yet earned the right to champion: