Drazzim will move about to K-20, swinging his glaive at the gricks there. (Using Action Surge)

Glaive vs. Grick: 26 vs. AC. Hit: 21 slashing damage.
Glaive vs. Grick: 18 vs. AC. Hit: 11 slashing damage.

Marfaen, decided to finish the Grick#1, prepares again to cast Chromatic Orb (last 1rst level spel slot) and targets the enemy with Thunder damage.

Attack: 12 Damage: 10 Thunder

Drazzim moves past Neya to attack the Gricks from another angle, but steps a bit too close to one of the obelisks in the process. Its runes light up and a purple foggy flare is let out.

-> Drazzim's WIS saving throw {DC 13} or becomes frightened: 7 - The dwarf decelerates his glaive attacks mid air, unable to fully focus on them as the terrifying obelisks are so close to him now.

Extra rolls on Drazzim's attacks due to disadvantage:
Attack#1: 19 - still a critical for Drazzim.
Attack#2: 12 - this is a miss.

The slow moving glaive manages to strike one of the Gricks, severing one of its tentacles (Grick#2 - CMD: 10)

Marfaen launches another sphere of arcane power towards the Grick in the distance. As before, the unstable orb does not manage to touch the intended creature and bursts harmlessly on the rocky wall.

END OF INITIATIVE ROUND 2

INITIATIVE ROUND 3

23. Neya 
16. Gricks
15. Rag & Drazzim - Drazzim is frightened of the obelisks (counter: 10);
14. Utar & Andmarir - Utar has his Spiritual Weapon out (counter: 10);
11. Graxx - Raging (counter: 9); 
04. Marfaen - protected by Mage Armor.

UPDATED MAP:

(Neya's and the enemies' turns will be dealt with next)

Neya unleashes a few quick hits at the closest Grick, but the creature's bouncy flesh takes away most of the power behind the attacks (Grick#4 - CMD: 25).

In turn, the Gricks will continue to attack their prey, with one of them finding a new target at Andmarir:

-> Grick#1 Tentacle (melee weapon attack) vs Andmarir: Attack: 12 Damage: 12 slashing. 

-> Grick#2 Tentacle (melee weapon attack) vs Neya: Attack: 5 Damage: 12 slashing.

-> Grick#4 Tentacle (melee weapon attack) vs Neya: Attack: 11 Damage: 9 slashing.

Once again, the creatures cannot manage to strike their foes.

(Rag, Drazzim, Utar, Andmarir, Graxx, and Marfaen are all up next. Neya may also post for next round if she'd like to.)

Rag will attack the Grick at L20 with a couple of arrows :

Attack #1: 20    Damage: 11 + Sneak Attack: 6

Attack #2: 

Attack #2: 22  damage: 3

Graxx will attempt to finish off Grick #4 with his greatsword using a reckless attack.

Attack:  9  Slashing Damage: 12

Divine Fury Radiant Damage:  3

Seeing Rag get clear of the tentacled beast, Utar decides prevention is better than cure. 

Striding forward to H18, Utar swings his warhammer.

Attack: 15 Damage: 8

The spiritual warhammer swings at the torture worm too.

Attack: 23 Damage: 3

"Not so easy when your prey isn't in a cage!"

Neya will continue raining blows on Grick #4 (or 2)

Shortsword: Attack: 24 Damage: 9

Bonus action! Unarmed Attack: 20 Damage: 7

Andmarir will take this time to shoot back against the one that decided to attack him. 

Attack 16

Damage 5

Colossal Slayer dmg 3

(@RagnerMonk: Unless you have a racial or class feature that allows you to attack more than once per turn, that second attack as a bonus action only really applies to a general feature called Two-Weapon Fighting, which everyone gets. I recommend you click on that portion of the character sheet and give it a quick read, but for our purposes here, a bow does not qualify under that bonus action feature, so I'll have to ignore this post.)

Away from his pursuer, Rag shoots an arrow at the next closest target. The unsuspecting Grick takes the projectile directly to its serpentine body (Grick#2 - CMD: 18).

(@MoistBooks: Your target has moved to I17 during its turn in order to attack Andmarir at J16. Utar does not need to move from J18 to attack it, but the Spiritual Weapon does. I'll move it to H18 to make your turn work as intended.)

Utar and his spectral warhammer both swing at the now closer target, smashing it a bit further (Grick#1 - CMD: 22).

(@Nantook: Shooting an enemy that is less than 5 feet away from you requires your attack roll to be made at disadvantage. Here's a second roll for your previous attack: 22 - It still hits.)

Taken a bit aback by the sudden approach of his enemy, Andmarir lets loose a short-range arrow. Despite the lack of force behind it, the arrow strikes true (Grick#1 - CMD: 29->DEFEATED).

Graxx tries to continue cutting his target down, but the latest swing of his blade misses its mark by a few inches.

(Drazzim and Marfaen are still up. I'll resolve Neya's turn after that.)

"Wh-what's with this haze?" Drazzim says, attempting to swing nervously at the Grick again.

Glaive vs. Grick: 17 vs. AC. Hit: 9 slashing damage.

(Right sorry I can do that wuth 2 daggers but not bow)

Marfaen decides to change his tactics, after the two fails with ranged attacks, so he moves in, on the closest Grick to him, and casts Shocking Grasp

Attack: 25 Damage: 3

And then he retreats, since now, with a success on his attack, he won't activate any attack of opportunity from leaving the Grick's range.

Despite his shaky hands, Drazzim manages to hit his foe with his long bladed weapon once again, carving a chunk of the creature's body away (Grick#2 - CMD: 22).

Here's a WIS saving throw {DC 13} for Drazzim at the end of his turn: 3 - still frightened.

Inspired by what looks like a certain victory now, Marfaen approaches the closest Grick and shocks it. Not a lot of lightning comes off of the wizard's hands, but it is enough to put the Grick out of its misery (Grick#4 - CMD: 28->DEFEATED). The wizard then retreats to safety.

END OF INITIATIVE ROUND 3

INITIATIVE ROUND 4

23. Neya 
16. Gricks - Only Grick#2 remains
15. Rag & Drazzim - Drazzim is frightened of the obelisks (counter: 9);
14. Utar & Andmarir - Utar has his Spiritual Weapon out (counter: 9);
11. Graxx - Raging (counter: 8); 
04. Marfaen - protected by Mage Armor.

UPDATED MAP:

(I'll resolve Neya's turn next.)

Looking to finish this confrontation, Neya slices the last standing Grick and then finishes it off with a chop to what would correspond to the creature's neck (Grick#2 - CMD: 29->DEFEATED).

YOU ARE NOW OUT OF INITIATIVE. DO AS YOU WILL.

Neya will move to the cage to assess the condition of the gnome.

Perception: 22

”Are you with us? Those worms are all dead.”

Drazzim, looking around to see if there are any other Gricks and noting they are all taken care of, heads over to the cage. "You okay, lass?" He asks, looking to see if there is somewhere he can apply a little 'leverage' to open it.