Unexpected Results

Objectives
Speak with Apprentice Mirveda and then protect her from the Scourge ambush.
 * [Optional] Speak with Apprentice Mirveda
 * Gharsul the Remorseless slain

Description
Something's wrong,. I sense the presence of Scourge. Be ready to fight them!

Rewards
You will receive:
 * 775 XP (or at level 70)
 * 250 reputation with Silvermoon City
 * 250 reputation with Silvermoon City

Progress
Is it over? Are they all gone?

Completion
My endeavors are hopeless,. The very nature of the soil has been altered... the taint is irreversible. Thank you for your assistance. I'll need to ask one last task of you.