Navrine looks at the drama unfolding “Well this is certainly awkward!” She looks to her companions “I guess if those froggy folk kill the lizard folk we won't be able to complete our mission. So I guess we should intervene?” She waits to see which way the party wants to move and steels herself for combat.

(Int: 18)

"This shall be a worthy battle. Those frogs will regret coming here today. If they survive to regret." and he accepts the potion, waiting to drink it until he is a bit closer to the enemies. He looks around to make sure everyone is in agreement before starting to sprint towards the Bullywugs 

Before charging, Chromir casts Message at Stone Feather, repeating the message they were taught. And also adding to the end (in common) "Malrik sent us. We fight frogs for you" (assuming with the draconic phrase it is all less than 25 words) 

Doc agrees with siding with the lizard folk. 

Init: 3

The heroes lingered atop their hillock, taking in the tense scene before them.

Chromir invoked one of the druidic charms he had learned in an earlier — and perhaps more peaceful — time of his life. His voice dropped to a whisper as he spoke the incantation, sending a magical message across the bog upon a conjured breeze. The first part, in the harsh tones of Draconic, carried the phrase Malrik had taught them: 'We seek parley with Stone Feather.'

The words were intended to mark the heroes as allies rather than adversaries. The second part, spoken in the Common tongue, was incomprehensible to the shaman.

Across the bog, the shaman paused mid-gesture, his reptilian eyes narrowing as the message reached him.  Stone Feather tilted his head, deciphering the words before muttering a reply in Draconic. His response returned to Chromir, but the meaning was lost on the barbarian, who did not speak the lizardman's tongue.

Before any further exchange could take place, the Frog Prince let loose a guttural, croaking decree that reverberated across the marsh.

"I, Frog Prince!!!"  The beast croaked.  "Bog, MINE!!!"

His gathered bog men erupted in a cacophony of angry croaks and charged forward. Half of the group, including the Frog Prince himself, dove into the dense cattail forest at the bog’s center. Their slick forms vanished into the maze-like cover, the reeds swaying ominously as they moved. The remaining bullywugs veered around the thicket, forming a spear wall with crude but deadly weapons held aloft, threatening any who dared approach.

Meanwhile, the massive lizardfolk bearing the wicker pack leapt down from his hillock and closed the distance between itself and the closest of the bog men. A poisoned spear lashed out from their line, catching him in the belly with a vicious strike. He grunted in pain but pressed on, kneeling in the muck to unshoulder the heavy basket it bore, and even though it was grievously injured ... took the time to set it down with care.

The other lizardfolk warrior, undeterred by the chaos, broke away and sprinted toward the heroes' hillock. Reaching the base of the small hill, it called out in draconic and waved his arms wildly toward the cattail forest, his sharp claws slicing through the air in urgency.

Though his words were foreign, his intent was not: the bog men must be stopped, and quickly!

Init - PC [HP]; Conditions & Effects; Actions
22 - Chromir [29/29hp]; Accept potion, Cast Message
18 - Navrine [17/17hp]; No action
16 - Cassian [23/23hp]; Retrieve potion, give to Chromir
03 - Doc     [19/19hp]; No action

Init - Opponent [hp inflicted]; Conditions & Effects; Actions
08 — Frog Prince; Croaked Decree, Move, Ready Attack
08 — Giant Toad; Move, Ready Attack
08 — Bog Men
B1 — Move, Ready Attack
B2 — Move, Ready Attack
B3 — Move, Ready Attack
B4 — Move, Ready Attack
B5 — Move, Dash
B6 — Move, Dash
B7 — Move, Dash
B8 — Move, Ready Attack (triggered later)
03 — Stone Feather, Thorn Whip vs B8, a miss!
03 — Lizardfolk
L1 — [7hp] Move,
->This triggers B8's readied attack, a hit! (3hp)
-->The weapon was coated with poison, prompting a Con save from L1, a pass! (4hp)
--->After B8 attacks, L1 kneels and takes off its pack
L2 — Move, Dash

Ongoing Effects
Cassian — Concentrating, Detect Poison and Disease, 10 minutes

(Nothing poisonous or disease ridden is within 30')

The hillocks are 10' tall and will require 10' of climbing/jumping to get down.  All vegetation and water on the lower level counts as difficult terrain.  The cattails in the middle are heavily obscured. B5, 6, 7, the frog prince and his mount jumped into the cattail forest ... they are now heavily obscured.  I Included their last known position so you could get an idea of what is going on ... but you cannot currently see them.

Doc sees that battle start and decides to boosts his companions. (casting Bless on Chromir, Cassian and Navrine).

Staying at the high ground for now.

"They're h-hiding in the cattails...Ah, who has the fire breath potion? Maybe we can burn away their cover." 

Seeing L1 already struggling, Cassian will quickly cast shield of faith on himself and jump down the hillock, dashing as far towards the lizardfolk and basket as he can.

Bonus Action: shield of faith on self (changing concentration to this from detect poison and disease)

Action: dash, move towards L1

Seeing Cassian jump down the hillock, dashing towards the lizardfolk that looks  in trouble, Navrine mumbles a prayer under her breath and says “Lets go guys!” as she jumps down after Cassian.

(Action: Dash, following Cassian)

Cassian raised his holy symbol high, intoning a prayer that summoned a shimmering shield of energy to envelop the paladin.  Without hesitation, Cassian and Navrine both leapt from the hillock, splashing down into the muck and charged toward the bog men.

The bullywug spear wall, however, was unforgiving. Two crude but vicious spears found their mark. One of the lizardfolk crumpled to the ground, clutching at the wound as the toxic coating on the weapons seeped into their veins. They writhed in agony, their groans mingling with the croaks and shouts of battle.

Chromir and Doc became the next targets of the bog men’s assault. Two spears hurtled toward them as well, cutting through the humid air, but both found only empty space, splashing harmlessly into the mire.

Doc, steady despite the chaos, raised his holy symbol and chanted an incantation. A faint glow suffused his allies as he cast a bless spell, bolstering their resolve and sharpening their focus. Meanwhile, across the bog, Stone Feather cast a spell of his own, his clawed hands twisting in a series of deliberate gestures. The marsh seemed to awaken at his command. Within the cattail forest, the ground shifted as the dense reeds twisted into sharp, menacing spikes. The sound of bullywugs crying out in pain echoed as they found their movements hindered by the treacherous terrain.

At the northern lizardman's feet, the basket writhed and shook, the structure shaking as something within struggled against its confines. The thick, tangled vines securing the lid began to give way, a hiss escaping from the shadows inside. Whatever was in the basket was moments from breaking free, and its arrival promised to shift the tide of the battle.

Init - PC [HP]; Conditions & Effects; Actions
22 - Chromir [29/29hp]; Blessed; No action*
18 - Navrine [17/17hp]; Move, Dash
16 - Cassian [23/23hp]; AC20; Cast Shield of Faith, Move, Dash
03 - Doc [19/19hp]; Blessed; Cast Bless

Init - Opponent [hp inflicted]; Conditions & Effects; Actions
08 — Frog Prince; ??
08 — Giant Toad; ??
08 — Bog Men
B1 — Move, spear vs Chromir, a miss!
B2 — Move, spear vs L2, a hit! (6 piercing + 10 poison)
B3 — Move, spear vs L2, a hit! (5 piercing + 7 poison)
B4 — Move, spear vs Doc, a miss!
B5 — Move, ??
B6 — Move, ??
B7 — Move, ??
B8 — [6hp] Move, retrieve spear and attack L1, a miss!
03 — Stone Feather, cast Spike Growth
03 — Lizardfolk
L1 — [7hp] Bite B8, a hit [6 piercing]**
L2 — [28hp] Dead

*Chromir took no action in this round and may take two actions next round.

**You may notice a discrepancy with the roll log. I accidentally rolled weapon attacks for this lizardman, but I forgot he was unarmed and so after rolling made the attack a bite instead.

Ongoing Effects
Cassian — Concentrating, Shield of Faith, 10 minutes
Doc — Concentrating, Bless, 10 rounds remaining
Stone Feather — Concentrating, Spike Growth, 10 minutes remaining

-The hillocks are 10' tall and will require 10' of climbing/jumping to get down. 
-All vegetation and water on the lower level counts as difficult terrain. 
-The are in the middle (cattails) is heavily obscured. 
-The green circle is the area of Spike Growth.

When Doc cast Bless  some of the heroes' turns had already occurred.  With a range of 30' the only heroes that could be reached by the spell are Doc and Chromir. Another good case for using initiative swap.

(Can we get advantage from the high ground?:P Oh, and could L2 be healed back up with healing word?)

Cassian strikes at B8 with his longsword but misses. He then uses his bonus action to lay a hand on L1 and heal them for 5 hp.

Action: Longsword to hit 8

Bonus Action: lay on hands on L1 for 5 hp

If L1 or Navrine are attacked by a creature he can see, he will use his Protection reaction to impose Disadvantage on the triggering attack roll and all other attack rolls against the target until the start of his next turn if he remains within 5 feet of the target.

Doc readies a javelin attack for when one of the bullywags comes within 30ft, as he knows he is less accurate beyond that distance.

Navrine strikes out  at the bogman (B8) with a  punch to the face, then follows up with a wild roundhouse kick to the bogmans face. Sensing her failed attack, she refocuses and centers herself as she  prepares for the coming attacks.

Action: unarmed strike to hit 24,  5 damage.
Bonus Action: unarmed strike to hit 6 (nat 1)

Chromir will charge at B1 (if I counted distance right, he needs to dash to reach even with 35ft of movement). He rages and then will recklessly attack (advantage, and all attacks against him have advantage until his next turn) 16 to hit, for 16 slashing damage. He then roars a battle cry at the group of 3 he can see.

Chromir bellowed, his primal rage surging as he charged headlong into the fray. The bogmen’s spear wall was no match for his ferocity; with one mighty swing of his axe, he cleaved through the nearest bullywug, cutting it down where it stood.

Navrine followed his lead, her movements precise and fluid as she darted into the chaos. One of her two strikes landed true, and another of the bogmen fell, crumpling into the muck.

Behind the monk, Cassian knelt beside the wounded lizardfolk warrior. The paladin murmured a prayer, his hand glowing with divine energy as he channeled healing power into the wounded ally.

Doc held his ground, his spear at the ready. His eyes scanned the battlefield, waiting for an enemy to come within reach, but none dared approach. 

From the thicket of Spike Growth  enchanted, razor-sharp cattails, the Frog Prince leapt free astride his monstrous giant toad. The razor vines had taken a toll, killing his bogmen warriors, their blood now staining the twisted reeds, but the Frog Prince and his mount pushed through with only minor wounds. Raising his lance high, he croaked a cruel challenge to Cassian.

“YOU NO KNIGHT!”  It bellowed, striking the paladin with its lance.

Then wicker basket — dropped earlier by the unarmed lizardman — finally burst open, its bindings snapping with a sharp crack! From within emerged two screeching cockatrices, their small, feathered forms deceptively fierce. One lunged at Navrine, its sharp beak almost  finding purchase on her arm ... before being blocked by Cassian's shield!

She staggered back, the petrifying venom coursing through her veins, her muscles stiffening as the magic threatened to take hold.

[Edited to include Cassian's Protection fighting style, which I originally forgot to include.]

The second cockatrice darted toward the giant toad, sinking its beak into the creature’s slimy hide. The toad gave a guttural croak but seemed unfazed, its unnatural resilience shrugging off the petrification’s effects.

The battlefield was now a chaotic cacophony of croaks, shrieks, and shouts as the fight raged on ... and then the ground under the cattail forest began to shake.

Init - PC [HP]; Conditions & Effects; Actions
22 - Chromir [28/29hp]; Blessed; Move, Dash, BA: Rage, Reckless Attack vs B1, a hit! (16 slashing)
-> This attack kills B1 (don't forget ... Chromir has Bless active.  It was not included in your attack roll)
18 - Navrine [17/17hp]; Two Unarmed Strikes vs B8, one hits! (5 bludgeoning)
-> This attack kills B8
-> Later in the round, Navrine was struck by a cockatrice. Please make a Constitution save vs DC11 or be Restrained [Edit — this did not happen]
16 - Cassian [15/23hp]; AC20; BA: Lay on Hands vs L1 [+5hp]*
-> Later in the round, Cass was struck by the Frog Prince. Please make a Strength save vs DC13 or be knocked prone.
-> Also, please make a Con save vs DC10 to maintain concentration on Shield of Faith
03 - Doc [19/19hp]; Blessed; Action readied

*Cassian's declared action was unworkable because there was no target (B8 had already been removed from play).  Cass essentially took no action, and may declare two actions next round.

Init - Opponent [hp inflicted]; Conditions & Effects; Actions
08 — Frog Prince [17hp]; (rides Giant Toad) Spear vs Cassian (w/ adv due to mounted), a hit! (8hp piercing)
-> This movement of 20' through the area of Spike Growth prompts 17 piercing damage.
08 — Giant Toad [33hp]; Move, Dash (both 20' jumps)
-> This movement of 20' through the area of Spike Growth prompts 23 piercing damage. 
-> Later in the round, Giant Toad was bit by a cockatrice. Con save is a success!
08 — Bog Men, AC15, 11hp
B1 — [16hp] Dead
B2 — [3hp] Move, Spear vs Chromir (w/ adv), a hit! (3hp piercing, only 1hp after resistance)  
-> 5' feet of this movement was through Spike Growth, prompting 3 piercing damage.
B3 — [9hp] Move, Spear vs Chromir (w/adv), a Miss!
-> 10' feet of this movement was through Spike Growth, prompting 9 piercing damage.
B4 — [2hp] Move, Spear vs Chromir (w/adv), a Miss!
-> 5' feet of this movement was through Spike Growth, prompting 2 piercing damage.
B5 — Move, Dead
-> 15' feet of this movement was through Spike Growth, prompting 16 piercing damage, killing B5
B6 — Move, Dead
-> 15' feet of this movement was through Spike Growth, prompting 14 piercing damage, killing B6
B7 — Move, Dead 
-> 15' feet of this movement was through Spike Growth, prompting 16 piercing damage, killing B7
B8 — [11hp] Dead
03 — Stone Feather, Thorn Whip vs Frog Prince, a Miss!
03 — Lizardfolk
L1 — [2hp] Move, Bite Giant Toad, a hit! (6hp piercing damage)
03 — Cockatrice**
C1 — Bite vs Navrine, a hit! (3hp piercing damage) [Edit — This attack triggers Cassian's Protection fighting style and the attack is made with disadvantage.  A Miss!]
C2 — Bite vs Giant Toad, a hit! (4hp piercing damage)

**There are now two cockatrices on the map.  They are trained to not attack the lizardfolk ... but they will indiscriminately target everyone else.

Ongoing Effects
Cassian — Concentrating, Shield of Faith, 10 minutes
Doc — Concentrating, Bless, 9 rounds remaining
Stone Feather — Concentrating, Spike Growth, 10 minutes remaining
Chromir — Rage, 10 minutes remaining

-The hillocks are 10' tall and will require 10' of climbing/jumping to get down. 
-All vegetation and water on the lower level counts as difficult terrain. 
-The are in the middle (cattails) is heavily obscured. 
-The green circle is the area of Spike Growth.
—The Frog Prince is currently riding the Giant Toad and occupies the southeastern corner of the large sized mount. 
(the tokens overlap and makes it difficult to see)