"That works for and against us. If he's vulnerable to our ambush he's vulnerable to others'. Hopefully no one else has yet taken notice."

"Yeah." And onward down the road.

...Where it turns out that, yes, someone reached him before them. The carriage is blood-splattered and surrounded by corpses - including a few vampires. 

"Well, looks like we're a bit late," Ena says, before leaning over to riffle through one of the vampire's pockets with practiced movements.

"These aren't ours. Anything identifying?"

"Yeah, a note. Says to take the priest to Forebear's Hideout. From someone called Malkus." She glances around. "...I don't know where that is exactly, but those bloodstains might be a good place to start," she says, gesturing to a light trail of blood leading away from the fight.

"Agreed. Let's go."

She follows the trail, which leads south for a bit before veering up a mountainside. There's a group of standing stones, and the trail seems to vanish, until - there, a wide crack in the rock, leading into a cave.

Within, the cavern widens, revealing a ruined underground fortress. In the distance is a glowing blue-green orb on a platform. The Dawnguard have clearly beaten them here; several vampires lie dead, and Dawnguard warriors patrol the remaining walls.

"Wonderful."

"Thoughts on strategy?"

She concentrates for a moment to activate her nightvision.

"I don't see any other exits. They're up against the anvil. We can be the hammer."

"I can probably take down a few of the guards before they can raise the alarm, though it'll get harder as they get closer together. Take over the walls, then open fire on anyone below?"

"Thinning their number is a good idea. You can support from above. I will take them at ground level."

"Right." And she draws her daggers, and slinks towards the ruins. Even knowing where she is, it's hard to track her, and she easily takes advantage, sidling behind each Dawnguard on the wall and slitting their throat before lowering them quietly to the ground.

Finally, the last one's dead, and she's looking out over the courtyard - there's a fire in the center, a single Dawnguard, and an armored troll, with another guard along a balcony overlooking the space. She signals Elana up, then draws her bow, carefully poisons an arrow, and takes aim at the guard that's beside the armored troll, killing him in a single shot.

Elana charges through the gates in her vampire lord form and engages the troll, knocking it down and dealing with the regeneration by ripping its limbs off.

The guard on the balcony notices her, draws his bow - and Ena's downed him in two shots. She hesitates, then moves into her vampire lord form, going to help Elana.

The troll is tough and cunning, but not intelligent. It doesn't really have a chance.

There are more Dawnguard further in. It's time for them to die.

Ena would prefer to continue sneak attacking, but, fine, they can charge in.

There's three Dawnguard in the next area, beside a glowing ball of light that contains a kneeling man and a small pile of vampire corpses. 

They go down, easily enough.

She sheds her form and investigates.

So does Ena.

There isn't an obvious way to take down the barrier around the Moth Priest.

After riffling through some pockets, Ena finds a teardrop shaped stone with glowing lines in the pocket of the most important-looking vampire corpse. She glances around, notices a standing stone sort of thing overlooking the courtyard, and walks up to it. "I'm going to activate this thing, be prepared in case something happens," she says.

"Right."

She does - 

And the barrier vanishes, and the Moth Priest goes to attack Elana. 

Inconveniently, she can't just kill him. She slides around instead, and grabs his arms in a lock behind his back.

He still struggles wordlessly against her.

Ena jumps down and punches him in the face. He snarls back.

"Calm yourself, priest, and cease your struggle."

Yeah that doesn't seem to be working.

"The enemies of my master will pay!" he snarls, upping his struggles.

"I think he's enchanted or something," Ena says. "Solutions other than knocking him out?"

"The other vampires must have enthralled him. I can override their compulsion and make him mine."