The immortal sun 

Nuvyen threw the front door open and was ready to charge forward when he spotted Shadowheart's lance glowing amidst the chaos of what was once their well-kept home, the glow illuminating not only the wreckage of domesticity, but the last of the Sharran assailants, eyes wide as she began backpedaling towards a plume of murky darkness behind her. 

Ohhh no you don't. 

Nuvyen summoned a burst of Ki, infusing his feet with the speed he needed to close the distance between he and the Sharran before delivering a crushing elbow to the assassin's solar plexus, then an uppercut, briefly sending the attacker into the air. With his resonance still in high gear, he managed one more attack: a vicious side kick, the Sharran falling to the ground, eyes rolled back into her head. The darkness that once loomed in their home disappeared, leaving he and Shadowheart standing in silence except for their breathing. Nuvyen approached Shadowheart, brushing a few drops of blood off of her forehead as he looked her over. 
"Did more damage than took it, eh?" He smiled, relieved that she had made it through yet another attack from those who would drag her back to Shar. 
"Might be beneficial to ransack the lot of them and see if they have anything else that can tip us off...but after we talk to Sef a bit more, eh?" Thankfully, Shadowheart seemed to have kept concentration on her Command spell, which meant that Sef was still by the entrance, his eyes wide with alarm at the results of the battle. 
"Love, snap him out of the spell, will you? He'll need to talk a bit more freely; besides, I doubt he'll have any real incentive to try and pull another stunt." A pat on the shoulder.
"Isn't that right, Sef?" A few moments later, Sef answered the question, his sensibilities back under his control:
“Yes, fine, fine!” Desperate annoyance edged his voice, indicating what Nuvyen suspected, which was that Sef had entered a lose/lose proposition. If he tried to escape and succeed, Shar would kill him. If he tried to escape and failed, he would die. If he confessed everything, Sharran assassins would come for him. There was really no way for Sef to escape this night alive unless he informed the duo of the scheme he had been involved in and make haste as far from Baldur’s Gate as possible. 
“How did you obtain that letter from the High Cleric?” 
“We ambushed a priest on the way here. Tailed him from Baldur’s Gate before we made short work of him. Some of us thought we could ambush you lot and avoid this nonsense, but obviously that wouldn’t work…nor did this.” Sef grimaced. 
“And why go after the priest in this context? Why not assassinate him in Baldur’s Gate?” Sef shook his head.
“Been to the city lately? Grand Duke Ravengard has us on the run, especially after ‘The Heroes of Baldur’s Gate’ swept us all out of the House of Grief. Hiding in cellars and caves like rats.” A smile formed, one filled with sadism.
“But you’ll see what Our Lady has in store. For you, for all of us. Soon Her embrace will not be a mere part of the Coast, but all across the Realm!” WIth a sudden jerk of Sef’s hand, the Sharran materialized an ebony dagger, which he then plunged into his chest. Nuvyen uttered a curse, vainly lunging for the dagger which disappeared as quickly as it came into existence. The damage had been done, however, Sef’s bleeding corpse just adding an exclamation point to the chaos that punctuated the home. 

The monk took a moment, half-closing his eyes, reaching out to their immediate surroundings to try and sense if there was a second wave of attackers, but nothing seemed apparent. They were alone again. Nuvyen turned to face Shadowheart, quietly telling her:
“We’ll need to see Isobel after all this. Both of you will have some things to discuss, I’m sure.” He scanned the wreckage, blowing out a sigh. 
“Least we can do is tidy up, eh?” Tidying up started with Nuvyen rummaging through the belongings of the Sharrans outside, finding weapons and provisions, but little to nothing of importance. 
“Mind searching Sef? He might have something on him that you’d recognize as important.”