Battle with the White Wyrm!

Your Power Break attack weakens its strength by half rendering its attack on you weak. You are healed by your cleric and the rest of you continue to rush the giant while he is weak and you soon overwhelm him. After he falls off the path, you continue on till you reach a large chamber made of crystal. As you step inside, a White Dragon descends from the roof to greet you. You can hear faint muttering from the dragon and its body begins to glow brighter and brighter. You need to act fast before something bad happens. What will you suggest?