Klong swaps his warhammer for his shield, to keep the Genasi grappled. Still straddling the enemy, he attacks twice. While doing so, he calls to the druid flying above, inspiring to be the best he can be. "Animal man, you strong. No fear, we win this!"

Bonus: bardic inspiration on Fil

Having finally busted free of it's webbing, the closest Mound shambles towards Fionula, getting within 5 feet, but not before taking another 23 radiant damage from Moonbeam.

Glim gets within range of the still grappled Vizann, and turns his eyes into a useless, cloudy white, Blindness Deafnessing the sorceror.

Fionula casts Eyebite to turn him into a debuffed souffle but Vziann saves

Kelvin blasts Vizann with a Ray of Frost, slowing it down and it hitting it for 28 damage despite appearing to have encased the entire creature in ice.

Klong, trying to maintain dominance, flings his shield away to adjust his grapple, and uses his other hand to bring his mighty hammer down on Miraj Vizann for 8 damage

Disgusted by the sorcerors disregard for nature and having been forced to transform into a bird to escape danger, Fil swoops over Vizann, and defecates in his now blind eye, doing 1 damage.

After a flurry of spell activity in which Kelvin counterspelled Vizann Counterspelling Klong who was counterspelling Vizann, he realizes his fate is decided and goes limp, yelling out "Hold, I submit. You have bested me. I will no longer resist"

22

Glim: 18 -->23 (concentrating on web)

Fionula: 23 

Fil: 19 (concentrating on Moonbeam)

Klong: 19

Kelvin: 16

Miraz Viznan : 14 (-53, grappled by Klong)

Near Plants: 5 (-63, DEAD) damaged plant needs Moonbeam save next turn, both plants restrained

Hearing the sorcerer apparently submit to his predicament, Glim turns his attention to the restrained mound, just in time to see it break free of its bonds and approach the injured Fionula. Not wanting to see her swallowed, and seeing that the two farther off mounds do not appear to be approaching any longer, the gnome decides to try to render the escaped mound helpless once again. Grabbing a small leather lace from his component pouch he loops it around his index finger and points at the mound, while muttering an incantation, causing the air around the mound to form into an invisible lasso which grips the creature, while the webbing on the bridge dissipates. The wizard raises his finger toward the sky, attempting to lift the enemy 20' into the air with the magical lasso. Meanwhile Glim backs away a bit (staying in range of Fi and Kelvin in case they need his help later), just in case the spell fails.

Action Cast levitate (DC 17 CON save or be lifted 20' in the air)
Move Take a few steps back but staying within 25' of Kelvin and Fi

Klong releases some of the pressure on the Genasi, but not all of it. "You come with us? We no more smash. But no trick, or else Klong angry. You no like when Klong angry."
Klong's second sentence is said with a chilling ring of truth.

Intimidation: 26

Glims spell takes hold but as he mentally tries to lift the Mound it feels extra strenuous. The Mounds left arm starts to raise but see it look at its own arm and pull it back down.

(The trouble here is the Mound weights roughly 3500 lbs)

The earth genasi cowers both at Klong's voice and at the ease with which he's manhandling him

Fionula

Bruised and battered by the earthquake, Fionula looks up, and up some more, as the shambling mound of rotting vegetation looms over her. Glim's attempt to lift it out of the way merely shifts it. Her eyes still leaking black tendrils of nothing, she looks the thing straight in its... face? She snarls and says...

"Boo!"

Action: Eyebite effect: Panicked. Mound must make a Wis Save vs DC 16 or be frightened of Fionula, moving away from her at a move+dash until it is at least 60' away and can't see her anymore, or the duration expires. Fionula has this round and eight more of duration.

Move: If the mound is running away, she will move as much closer to the genasi as she can get this turn. If the mound saved and is not running away, she will... move 30' directly away from it south, incurring an attack of opportunity but hopefully just one, and getting far enough away that it can't catch her when it moves.

Shambling Mound save vs Eyebite 3

Fionula's terrifying visage causes something rarely felt by a Shambler -- dread.  It immediately turns and dashes 40 feet away, into the bog

Fionula addendum

If Fionula gets an attack of opportunity on the shambler as it runs away (see offline discussion on Discord), here is what that roll would be like. She would use her War Caster feat to use her Reaction to cast Primal Savagery: 16 to hit, for 10 acid damage.

Edit: meh, all moot, I expect that's a miss.

Edit edit: ruled no Attack of Opportunity, moving on! :)

Seeing the mound flee, Fil is going to move the moon beam closer to the genasi. He nods at Klong and tilts his head at the moon beam, indicating to throw the genasi at it if he tries anything funny.  

Klong nods back at Fil, acknowledging the message.

Readying another blast of frost, Kelvin shouts to the genasi, "Call off your pets...plants...things, damnit! We don't want to kill anyone we don't have to."

Vizann gasps. "Pets?! You think those are mine? No they live here, waiting for fools to walk into them. Terribly stupid things."

Glim readies a firebolt as well, and will release it at the genasi if he begins casting anything or does anything aggressive. 

"We have no time for you. Leave us alone to continue across and we will let you live," he says, presumptuously speaking for the group without consulting them.

Fionula

Still casting of blots of darkness from her eyes, Fionula sidles up to the genasi, where Klong is still sitting on him. "Nice to meet you," she says, and casts Charm Person on him.

Save vs Wisdom DC 16 or be charmed.
DM asked for a Perception check (rolled on Discord): 19

Vizann mumbles and shifts awkwardly, then visibly relaxes and looks at Fionula. "Hello my friend!"

Unfortunately for him, you noticed him Counterspell it while trying to disguise it

Fionula

”Well, aren’t you a tricksy one! Klong, you stay sitting on him until I tell you otherwise. Now, let’s try this again.” And she casts Charm Person again.

As Glim catches the genasi wiggling his fingers behind his back to counter Fi's first charm attempt, he releases the bolt of fire that he'd been holding in his hand. Unfortunately with Klong holding the prone sorcerer down, Glim has trouble aiming it and instead of striking his target manages to hit his goliath friend squarely in the back (18 damage).

He steps gingerly up to the bard and says, "Uh, sorry about that... Haven't tried to aim one of those in a while. When, uh, you have a free hand I've got a couple of healing potions in my bag with your name on them."

Locking his eyes on the genasi Glim points his index and middle fingers toward his own eyes and then at his foe's eyes, with a stern expression on his face.