Armed with sword of broken light

"That was no one to us, but someone with much to prove to himself." She turns both you and the conversation. "Now, you have a path before you. Our order is still new and must be seen to be a beacon of hope and strength that our people need. The Magisters and Farstriders have our borders well protected. But it is a stalemate. The Scourge continuously befoul our lands. The Dead Scar will never recover if they do not leave. I charge you, Athaniar, with purging Arthas's legacy from Quel'Thalas."

Lady Liadrin raises an eyebrow at you, "I have given you your task. It is up to you to decide the manner in which you succeed." She considers something for a moment. "However, I will tell you that initial reports confirm the regeneration and recreation of Scourge forces originating at the southern border of our lands, in which lies a fortress, Deatholme. Perhaps there you will learn why the Scourge numbers do not thin despite our efforts."

As you enter the the massive open air stables, you find hawkstriders of many different colors and each one has a name on a placard above its stall. Along with a name is an insignia. There are three with the Blood Knight insignia available right now: Clipper, a black hawkstrider with red accent feathers; Stormy, whose feathers range from crimson to maroon; and Dee, a plump hawkstrider of pale yellow and white. They are all well taken care of - as is evident by the several staff members of children to young adults caring for and cleaning the animals and stalls. You know you are allowed to use the Blood Knight hawkstriders for official business, so once you've made your choice, you can head out of the city down through Eversong Woods.

You ride through Eversong Woodsatop your hawkstrider, Stormy. You pass a few fellow Sin'dorei along the way, most of them nodding to you or otherwise acknowledging your presence. Some of them are just too wrapped up in what they're doing to give you any attention. Sharply, the land changes. The trees are now dark, barren, or twisted. The very air is tainted with a wrongness acute to every one of your senses. This is the Ghostlands, a nickname given to the southern reaches of your people's lands. It is the area most corrupted by Arthas and his Scourge during his invasion of your homeland. It is the area Lady Liadrin sent you to as it is the area most resistant to cleansing. The Dead Scar continues its path here farther to the south. The road you have traveled on brings you to an outpost known as Tranquillen. Here, Blood Elves work toward similar goals to you. Some may have knowledge you need.

As you dismount your Hawkstrider, you see the tainted forest surrounding this former High Elven settlement. The dilapidated structures still serve some purpose though as evident by the Blood Elves and Forsaken stationed here. They appear to be working together with various functions from militant to magical study.
"The highest ranking person" as it would appear, seems to be a Blood Elf, red haired and wearing robes of varying shades of black, grey, and white on top and a red shawl around his neck to match the bottom half of his robes. He stops a few feet away from you, looking you over before speaking. "Greetings, Blood Knight. To what do we owe this honor?"

The Blood Elf twitches an eyebrow and - in true Sin'dorei fashion - haughtily replies, "Remember, this so-called atrocity is our homeland. We shall see it cleansed." He takes a breath and straightens his pose. "I am Magister Darenis. Sin'dorei and Forsaken share a common goal in the Ghostlands. Together we shall defeat the Scourge and who knows... perhaps the Forsaken will be valuable allies in our quest to reach Outland. For it is promised by our Prince that our salvation lies with him in that shattered world." He pauses a beat. "But first things first... We will rid our lands of the accursed Scourge. We have burned and torn asunder countless numbers of the monstrosities, but still their number do not appear to thin. We must cut them off at the source. They are being created, I am certain of it. The Cult of the Damned is suspected. Thus, we must exercise caution. There is an arcane sanctum, the Sanctum of the Moon, to the west. It is overrun with mana wyrms and elementals from which I ask you to recover crystallized mana essence." He looks to you expectantly.

Magister Darenis nods, "Walking is possible, but there is a sense of urgency about our cause. We shall provide you with a fresh mount and care for yours. You will want to return your mount to return - should you be victorious in your efforts in these lands."
He leads you to a stable beside the ruined inn. It's been built recently guessing by the condition. He stops in front of a grey hawkstrider with flecks of orange randomly across its body. "Cinder will serve you nicely. I look forward to your return." He bows and returns to his business.

Mounting Cinder, you two ride off to the Sanctum to the Moon. Crossing the DeadScar, you find the sanctum easily, thanks to the palpable lingering arcane energy from this former nexus of power. That, and the mana wyrms and elementals practically glowing to your Blood Elf senses. The creatures mill about the sanctum, feeding off whatever scraps of power can be found, but with some of the creatures interacting, sharing and stealing power from each other. They do not seem to have noticed you asyou are a few dozen feet away.