((Not an area spell, but since it's been ages, and they might or might not have made it to the sheets here, but you do have your limited use items from the gnome complex.))

Randy drops the one in front of him as the planar energy rips through it, before turning and thrusting deep into the one to his right. Ulmwin's squad puts the bug down under a stabbing flurry of spears, as he manages to eek a blast past one of the other squads to hit the one that Randy just stabbed.

Coljin (and Squad) <----<<
Dornikal
Randy 
Ulmwin (and Squad) 
Zokk (and Squad) <----<<
Bugs
Something making large scary noises

Zokk goes to the one facing Randy and hits it a few times, one with a kick.  If it's still up they will move on the otherside of the pillar (mobile so no attack of op)

Attack: 13 Damage: 9

Attack: 8 Damage: 11

Attack: 15 Damage: 9

Zokk squad attacks the right most bug. Attack: 18 Damage: 15

Zokk misses twice with their staff, before catching it with a ball of roots as they rumble around the far side of the pillar. To the east, their squad drops one of the bugs, leaving just two and the source of the ruckus farther ahead for Coljin and his squad!

Coljin moves north 10 feet, again casts toll the dead, (the middle living bug) and then moves back 10 feet.  20 Ignore this roll, I did it wrong and don't want to try changing it, LOL    14Toll damage if injured  10  Toll damage if uninjured

The squad attacks the bug closest to them!  8  to hit      26 squad damage

The two remaining bugs harry the dragonborn.

Attack: 7 Damage: 17
Attack: 12 Damage: 20

At the far end of the chamber, the wall collapses in a spray of rubble, and there is horrid screeching and mandible clacking as an enormous bug sticks their front into the room!

((One of the dragonborn in Zokk's squad drops as its savaged by the bug.))

((How far is the big'un from Dornikal? 35ft or so?))

((He'd be adjacent to it if he moves 50ft.))

((Ah, too far for this round. Is Dornikal up? If so he'll move around the column to support the dragonborn. ))

((Entire party is up.))

Dornikal roars a challenge at the big critter before moving over to recklessly hack down its babies, trying to draw its attention with wild, power swings.

"Ye won't keep Dumathoin's gifts hidden away beasts!"

Attack one: Attack: 21 Damage: 14

Zealot damage: 4

Attack two: Attack: 23 Damage: 14

((Reckless attack, if one drops move to the other.))

Dornikal moves in, dropping one bug and hacking into the second, while shouting at the big beastie.

((Rest of the party is up!))

"That's... a big bug."

Randy shifts targets to the newcomer, changing back over to bow.

Bow  attack 1:  Attack: 11 Damage: 11

Bow attack 2:  Attack: 14 Damage: 11

(If in 30 feet: Planar warrior:7 )

((If Randy moved up 25ft, he'd be within 30, but I'm assuming you're not looking to front line this thing.))

Randy hits it twice with arrows, the creature hissing in anger at the audacity.

Coljin moves into the room, (Kinda behind Randerwaith, maybe a little west of that if movement allows) and then casts Bless on Randy, Zokk and Dornikal.  (I think they are all within 30 feet of Coljin if he moves to that area.

Coljin makes it up behind his squad, and can just see one of Zokk's branches to be able to bless his three companions.

Zokk rushes to the bug, spending a ki to double move and attempts to pummel it.  

Attack: 25 4 Damage: 15

Attack: 18 3 Damage: 5

if any hit, make a dc con 14 saving throw or be stunned, using both ki if I have to so I can do it twice.

Zokk dashes across the room to slam their staff into the creature, hitting it with the first blow.

CON Save: 10

It's legs buckle momentarily, but it shakes off the blow as Zokk's second blow skitters off its armor.

(Legendary Resistances Used: 1)

It snaps at Zokk, its mandible seeking to clamp down on them.

Bite Attack: 17 Damage: 18 piercing 

(Legendary Actions Used: 1)