Fire Chalk

This red chalk can be used to draw a line on an appropriate surface, which then erupts into flames one round later. The chalk can be used to draw up to 60' in an uninterrupted pattern and 1 round later a vertical sheet of flame 5' high will erupt from the line. The flame will burn for 1 turn (10 minutes) and deal 2d6 damage for anyone crossing the plane. The Fire Chalk can be used up to 3 times before losing its red color and reverting to white chalk.