((Missed the post. Sorry)).

Qinfaren , barely able to stay on his feet, sways a little but is happy to see both dire wolves remain up and going.

Both pounce on the same quaggoth (the one that attacked the dire wolf on the left)

Dire Wolf 1 - Attack: 16 Damage: 14  and if hit, DC 13 STR check or knocked prone

Dire Wolf 2 - Attack: 15 Damage: 13  and if hit, DC 13 STR check or knocked prone

Qinfaren angles himself to face the other two quaggoth and then releases a wave of thunderous energy.

Casts Thunderwave at Level 3 at both of them: CON Save DC 15 or takes 16  thunder damage and are both pushed 10' away (half damage on save)  

The two dire wolves attack the quaggoth on the left tearing it apart, and knocking it down. Whilst Qinfaren blasts the other three quaggoths away.

Then Xardorok points his spiked gauntlet at Bjorn and Blue casting eldritch blast twice.

(Attack: 18 Damage: 10 force damage.
Attack: 20 Damage: 10 force damage.)

The first eldritch blast strikes Bjorn in the side before the second one strikes Blue, causing him to vanish.

With Blue gone, for now, Bjorn casts healing word on Qinfaren. Then he returns fire on Xardorok.

(Healing word: 6
Attack: 14 Damage: 10 piercing damage.)

The arrow from Bjorn's longbow flies through the air but it harmlessly bounces off of Xardorok's armour.

Then suddenly four duergar, one on top of each tower turn to attack the other duergars. Each swinging their war pick at the others.

(Attack: 7 Damage: 5
Attack: 15 Damage: 8
Attack: 19 Damage: 8
Attack: 21 Damage: 5)

However, each of the four duergars find their blows being blocked. In retaliation the other duergars fight the traitors.

(Attack: 14 Damage: 7
Attack: 9 Damage: 7
Attack: 6 Damage: 4
Attack: 21 Damage: 9
Attack: 8 Damage: 6
Attack: 23 Damage: 6
Attack: 17 Damage: 8
Attack: 21 Damage: 5)

(Order: Bàn, Forewoman, Quaggoths, Qinfaren, Xardorok, Duergar guards.)

With a couple of the turn coat duergar guards being hit, the battle continues on.

(Bàn's turn)

     "What's going on?" Bàn asks with more than a little confusion when it appears duergar is fighting duergar.  He isn't sure which of them to attack at all, at all... So he targets a Quaggoth instead, first dropping a hex upon it and then lets loose with an eldritch blast.  (Disadvantage on strength checks from the Hex...)

Eldritch Blast vs Quaggoth:  23 to hit for 7 damage
Hex Damage:  6

The quaggoth is struck by the eldritch blast and is cursed.

The forewoman then charges into battle swinging her war pick at one of the dire wolves.

(Attack: 21 Damage: 14 piercing damage.)

Then the quaggoth nearest to the wolves stands back up before slashing out with its claws at both of them.

(Attack: 18 Damage: 7 slashing damage.
Attack: 12 Damage: 6 slashing damage.)

The forewoman badly wounds the dire wolf, but the quaggoth misses this wolf. It does manage to strike the other wolf.

The remaining quaggoths move to surround Bàn and Qinfaren. Then the quaggoths lash out at Bàn and Qinfaren.

(Bàn
Attack: 12 Damage: 8 slashing damage.
Attack: 24 Damage: 7 slashing damage.
Attack: 14 Damage: 9 slashing damage.
Attack: 12 Damage: 5 slashing damage.
Attack: 17 Damage: 7 slashing damage.
Attack: 11 Damage: 9 slashing damage.

Qinfaren
Attack: 14 Damage: 4 slashing damage.
Attack: 6 Damage: 9 slashing damage.
Attack: 24 Damage: 9 slashing damage.
Attack: 12 Damage: 6 slashing damage.)

As a reaction Bàn casts Shield so his effective AC is 23 until his next turn and thus avoids all the strikes against him.

Both dire wolves are badly injured (HP3 and HP5) but its not in their nature to turn and run. They both tear at the forewoman.

Dire Wolf 1: Attack: 24 Damage: 11  

Dire Wolf 2: Attack: 16 Damage: 11  

If either hit, DC13 STR save or forewoman knocked prone.

Qinfaren smiles at seeing the two wolves still standing, but that's the last thing he sees as he falls under the onslaught and collapses to the ground.

Death Save 1: 17  

(Forewoman: 13)

The woman is badly injured by the wolves but resists being knocked prone.

Xardorok then unleashes another two eldritch blasts this time at Bjorn and Bàn.

(Attack: 13 Damage: 14 force damage.
(Attack: 9 Damage: 14 force damage.)

Bjorn's armour manages to protect him from the blast of Xardorok's spell. Then seeing that his alley has fallen once more, he walks over to Qinfaren and places a glowing hand on his forehead.

(Cure wounds: 5)

He then turns his attention to the forewoman and points a finger at her. Suddenly there is the sound of a dolorous bell fills the air.

(Toll the Dead: 11 necrotic damage.
Forewoman: 11)

The forewoman is struck with necrotic damage and she collapses where she is to the ground.

Meanwhile, the remaining duergar continue to fight themselves on the towers.

(Attack: 19 Damage: 6
Attack: 8 Damage: 8
Attack: 7 Damage: 9
Attack: 11 Damage: 9)

(Attack: 22 Damage: 3
Attack: 9 Damage: 4
Attack: 8 Damage: 7
Attack: 9 Damage: 10
Attack: 20 Damage: 10
Attack: 6 Damage: 9
Attack: 17 Damage: 7
Attack: 15 Damage: 8)

(Bàn's turn.)

     Bàn is more than content to allow the dueregar to fight amongst themselves.  He isn't attacking any of them as he has no idea of who is on whos side, nor if any are on his... And if they are, why.  So instead he attacks a quaggoth... Whichever looks most wounded.

Booming Blade Attack with whip vs quaggoth:  19 to his for 7 slashing damage.  If hit, it becomes sheathed in booming energy until the start of my next turn, taking 2 thunder damage if it does move...

Bàn uses booming blade to strike the quaggoth with his weapon, leaving it seriously injured but alive.

Then that quaggoth backs away from Bàn moving to attack one of the dire wolves instead. It suffers damage as it moves. Then it attempts to attack, slashing twice with its claws.

(Attack: 10 Damage: Unable to parse dice roll. slashing damage.
Attack: 22 Damage: 4 slashing damage. + 2 if it hits.)

Then the other quaggoth continues to attacks the other dire wolf.

(Attack: 23 Damage: 5 slashing damage.
Attack: 21 Damage: 5 slashing damage.)

Then three of the quaggoths move to attack Bàn.

(Attack: 15 Damage: 7 slashing damage.
Attack: 14 Damage: 5 slashing damage.)
(Attack: 19 Damage: 4 slashing damage.
Attack: 21 Damage: 6 slashing damage.)
(Attack: 20 Damage: 5 slashing damage.
Attack: 22 Damage: 6 slashing damage.)

The last quaggoth moves to attack Bjorn.

(Attack: 18 Damage: 8 slashing damage.
Attack: 23 Damage: 4 slashing damage.)

(Wait! Redoing the attacks on the second dire wolf, Bàn and Bjorn. Only one quaggoth should have advantage.)

Wolf:

(Attack: 7 Damage: 7 slashing damage.
Attack: 20 Damage: 7 slashing damage.)

Ban:

(Attack: 13 Damage: 9 slashing damage.
Attack: 21 Damage: 9 slashing damage.
Attack: 12 Damage: 5 slashing damage.
Attack: 16 Damage: 5 slashing damage.
Attack: 11 Damage: 9 slashing damage.
Attack: 21 Damage: 4 slashing damage.)

Bjorn:

(Attack: 9 Damage: 4 slashing damage.
Attack: 14 Damage: 7 slashing damage.)

Both dire wolves succumb to their wounds and collapse, but then disappear.

Qinfaren blinks back awake, rubbing his side as he does, just in time to see the dire wolves depart.

"Bye. Thanks for the help," he says sadly.

Getting to his feet, he adds to Bjorn and Bàn "I can't keep doing this."

Looking quickly around, he sees the quaggoth still attacking Bàn.

Qinfaren quickly slam the end of his staff against the ground. As he does a thunderous reverberation grows and then echoes outwards from Qinfaren, taking in as many of the quaggoth as he can get (turning slightly it looks like he could get the three quaggoth that attacked Bàn, plus one that was going after a dire wolf - four total).

Casts: Thunderwave at second level - doing 15  thunder damage on a failed CON save (DC15). On a failed save they are pushed back 10' as well (preferably into that molten metal trough).  

Qinfaren manages to blast four of the quaggoths with his thunderwave spell. They struggle to resist the spell but are instead knocked back ten feet.

Seeing his forewoman defeated, Xardorok takes the opportunity to grow in size.

"We keep fighting," Bjorn responds to Qinfaren. "Until the end."

He then fires another arrow at one of the quaggoths.

(Attack: 10 Damage: 11)

The arrow flies through the air missing the hairy creature.

The rest of the duergar continue to fight amongst themeslves.

(Attack: 23 Damage: 5
Attack: 24 Damage: 12
Attack: 13 Damage: 3
Attack: 11 Damage: 4)

(Attack: 14 Damage: 4
Attack: 16 Damage: 4
Attack: 16 Damage: 6
Attack: 24 Damage: 8
Attack: 13 Damage: 5
Attack: 18 Damage: 4
Attack: 13 Damage: 3
Attack: 9 Damage: 9)