Bring 3 Marks of the Valiant to Flickin Gearspanner at the Argent Tournament Grounds.
If you lose your lance, you can get another from any of the Lance Racks near the stables or in the Silver Covenant Pavilion.
The grand melee is the most important of the tournament's competitions. We know everyone's looking forward to seeing us in the competition. To that end, we've been honing our skills against the valiants representing the other Alliance capitals.
I suggest you do the same.
Go to the stables outside the pavilion, equip your lance, mount the stabled turbostrider, and challenge the valiants. They wait in the Alliance Valiants' Ring just outside our tent.