You just hear the wind moving around, nothing out of the ordinary. 

"alright it's gonna be safe for a good distance" Izen said with a grin 

Tundra comes back from the lizard den, follows behind Izen's flasks, and enters the cave. She still is visibly upset about their adventure not having led to the landscapes she became infatuated with, a feeling that seems to grow as she walks towards the next underground area. She is so taken by her morose thoughts that she forgets the ambient danger and makes no particular attempt at sneaking.

The tunnel slowly levels out but the tunnel continues going deeper and deeper, the feet you you go the move the walls become more stones rather than ground. You see light at the end of the tunnel but forced to stop as the tunnel ends on iron bars, very familiar iron bars expect you were on the other side of the bars. There's no lever on this side to open the iron bars. 

In front of you beyond the bars is the pit and across the pit is the open tunnel you came from before. You hear rumbling from behind you before a large gator with a rider come from behind you of the down ramp. Roll initiative.

The gator looks like it could reach you with a single lounge. (Add On) The tunnel which is wide enough to find three of you side by side, the gator takes up the full width on its own. 

Gwazi - 18 - Longbow
Onyx - 15 - Longbow
Gotch - 12 - Fog Cloud / Hide
Tundra- 11 - Staff Attack + flurry of blows
Izen - 9 - Recall information
Mai - ?

Gator Initiative 4 (hahaha)

 Gwazi sets his feet, readying himself for the assault. He'd been a bit quiet up until this point after exiting the arena, taken aback by the strange environment they now found themselves in. It looks like no place he recognizes, nor anywhere near a place that he might be familiar with, and it fills him with sorrow. He knows nothing of the world he has left behind, now, not even if his friend lived or died.

As he readies himself he unslings his longbow and takes a first shot, then readies himself for close combat.

Mechanics:

Startled in her thoughts, she turns to the gator, gripping her staff, she cuts off her concerns and lets her body move as it wishes. For a few moments, she feels wondrously alive and soon, she has no remembrance of even being upset. (uses a ki point)

gotch:  12

Gotch will cast fog cloud

Gotch then uses his bonus action to hide.

Stealth:  23

iniative 5z

can I attempt to observe the enemy and maybe learn something about it?

nature 7

Innitiativ 19

I draw my longbow and use hunters mark

I shoot two arrows at the gator

Attack: 13 Damage: 10

and

Attack: 15 Damage: 22

so no activity from Mai so playing for her this turn at least. 

Initiative: 7

Gwazi
As soon as Gwazi aims longbow the rider raises his lantern and seem to cast a spell that covers himself and strangely the Gator in a greenish aura. As you let loose your arrow, it punch through the aura, hitting the giant gator.

Onyx
Onyx marks the Gator and in rapid order, fires two arrows at the beast. His first arrow strikes true but the second shot is dodged by the beast.

Gotch
Gotch throws up a fog cloud in between themselves and the gator before trying to find a little nook to hide.

Tundra
Tundra charges into the fog and soon find a leg which he strikes. His staff is deflected rather violently by the aura that surrounds the beast.Tundra spins and attempts to sweep the leg out twice. His first kick knocks out the leg but his second kick misses as the leg is knocked out but as the creature falls on it's belly, the missed kick found the beast.
Gator Str Save: 11
Advantage on second attack roll since Gator is prone: 22

Izen

            Izens probes his mind, drawing up on countless survival manuals, research on beasts and snippets from Izen has heard.

The Giant Crocodile is a huge Beast with a tough hide that often used as actual armor with proper care. The Beast’s weapons are it’s teeth that can snap down on a target and it’s mighty tail. No vulnerabilities or resistances. It has high strength and tough but is quite unintelligent and has little sense of self but you believe the rider will offset this but baseline in other traits. .

Mai

Mai attempts to hide in a similar nook as Gotch. 
Stealth: 18

(For this battle, the Rider and Giant Crocodile is regarded as a single entry, rider directs but has no actions really)
Gator

Without any commands, the Crocodile stands up attempts to bite down on the bug by it's leg but found nothing in it's mouth so spin and attempts to tail whip Tundra with little luck. The greenish aura around the beast has dissipated. 

Attack: 10 Damage: 24
Attack: 7 Damage: 13

“TAKE OUT THAT RIDER” Izen called out to his companions 

Gotch casts minor illusion  Making the sound of another gator up the tunnel further.  He makes it do the sound of a gator challenging another gator for supremacy.

Gwazi -Spear strikes
Onyx - zephyr strike and get behind (have you squeeze yourself between beast and tunnel wall and only can do due to zephyr strike)
Gotch - Minor Illusion
Tundra - Dodge
Izen - Fire bolt
Mai

Gator

Izen will snap his fingers causing a small bolt of fire to appear which he shoots out towards the rider

Firebolt Attack: 11 Damage: 5

With fog heavily obscuring my view, i cast zephyr strike, draw a short sword and approach the gator to strike it

Attack: 15 Damage: 15

If possible i would like to move past the gator (i have 60 feet speed and no AoO for this round) and towards tho open end of the tunnel. If that isn‘t possible i would retreat back into the fog.

Gwazi also ducks into the dense clouds after Onyx, switching out his bow for the two spears.

Mechanics:

So you know, the radius of the fog is 20 feet, so it fills the tunnel for 40 feet...

Rough Map of start of turn #2 or at least what it looks like in my head. 

Having been spared by the powerful blow of the dino-gator, Tundra realizes how outmatched she is against her foe. For a second, thoughts of fear pass by her, but she eventually succeeds in maintaining her mindful state and prepares to dodge whatever comes at her. (uses Dodge action)

Gwazi
Gwazi charges in and his spears find flesh within the fog, the beast seems to roar in protest as Gwazi twists his spears to hurt the beast more.

Onyx
With a strike summoning nature’s energy, Onyx sqeeuzes between the beast and the wall to get behind the beast, emerging from the fog, He see the gator’s tail whip out of the fog absent-mindly.

 
Gotch
Gotch attempts to trick the beast but find his cantrip can not reach where he wanted as the fog blocks his view. A second growl echoes from the mist but the Lizardfolk’s voice shouts out in draconic, “Ignore”

Tundra
Tundra takes up a Defensive stance next to the gator’s leg.

Izen
Izen fires the bolts into the mist, lighting it up as it strikes the gator.

Mai
Mai casts Faerie Fire to show the beast better. Both beast and rider is set aglow.
Dex DC: 14
LF Dex Save: 2
Gator Dex Save: 7

Gator
Bites and swing its Tail
Attack: 17 Damage: 18
The gator grabs a hold of Tundra in it's mouth before swinging it's tail at Gwazi.
Attack: 13 Damage: 16