Flame Trench Battle

This battle map has a "flame trench" and a bridge, as well as a ruined structure on one side. The idea of the battle is, one player must activate the magic in the ruin to light the trench, sending fire hundreds of feet into the air. The other players must defend that player while he/she accomplishes this task. Since the bridge will be destroyed, this battle and timing of activating the trench must be very strategic.