Jushu is going to survey the scene then cast vicious mockery on the closest enemy to him, doing 4 psychic damage on a failed dc 24 wis save and has disadvantage on its next attack.

so B2 has to move on its turn -

Target also moves 5 feet in a random direction if it can move and its speed is at least 5 feet. Roll a d4 for the direction: 1, north; 2, south; 3, east; or 4, west. This movement doesn’t provoke opportunity attacks, and if the direction rolled is blocked, the target doesn’t move.

For Direction: 4

Quote from Charwoman_Gene >>

Was that originally higher? The forum dice roller is wonky sometimes.

No it always said 5. The dice roller is definitely wonky, I'll probably use the game log from now on.

Hort con save 16

B2 already moves, the target of infestation moves immediately, not on their turn.  Matti also killed B2.

Hort, you are unaffected by the gas. Matti, you got a lungful and are wracked with pain and can't move as your body starts turning to stone!  You are restrained, and the petrification is advancing rapidly.

Jushu, I assume that 24 was a typo for 14.  The creature seems shaken by your words.

The three creatures to the north move away as fast as they can, leaving the remaining injured one.  It moves up to Hort and slashes at him with two swords, but they just clang against Hort's Armor.

Everyone feel free to take an action.  (Not posting a battlemap for one enemy remaining.)

Tram will use Ray of Sickness
Attack: 21 Damage: 6

The sickening green ray strikes the creature which turns to stone and emits the gas like the other.  Hort, give me a con save.

Matti turns fully to stone.

Combat is over unless you are pursuing the tougher and less battleworn creatures that left the scene.

Hort Con Save 9

(Yeah, that was a typo.)

Jushu will run over to Matti and examine her now-stone form, before casting healing word, healing her for 5, hoping that the spell has some effect.

Hort begins turning to stone.  Matti is now solid stone, the healing word has no apparent effect.

After about a minute, the creature's stony corpse crumbles to dust, followed shortly by the stone covering Matti cracking off and turning to dust, revealing Matti unharmed.

Hort goes through the same process.

Hort blows stone out his nose and sheaths his weapon.

"That was dreadful... Absolutely dreadful. Good show though everyone, now what are all these?" He says looking around at the battlefield 

“Wow. That was amazing. “ Tram says looking over his friends coming back from being stone. 

The three soldiers each wear plate armor with filigree and horned helmets distinctive to Knights of Solamnia, but each suit bears vicious claw marks that make it unusable.

You investigate the destroyed wagons and find correspondence that states the knights were investigating reports of nearby farmsteads being raided by strange creatures that match the ones you fought.

Among the wreckage are also three longswords, eight days of food and water for one person, and 40 gp.

In her rage Matti pushes against her own body, why won't it move? Then she notices the stone creeping over her, and rage is replaced with fear. "No, no!" All turns to darkness.

Next thing she sees is cracks of light across her vision, like lightning but unmoving. The stone begins to flake away, and when her hands are freed Matti wrenches away the rest of it. 

"What the hell was that?!" 

Does Matti recognise these creatures? Would her Stonecunning help with this, or is that more for architectural stonework?

You have definitely never heard of these creatures.

Hort goes to each knight to close their eyes of open and sings an old Solamnic Funeral song in a thrumming base (under his breath as to not disturb conversation)

"Return this man to Huma's breast
Beyond the wild, impartial skies;
Grant him a warrior's rest
And set the last spark of his eyes
Free from the smothering clouds of wars,
Upon the torches of the stars.
Let the last surge of his breath
Take refuge in the cradling air
Above the dreams of ravens, where
Only the hawk remembers death.
Then let his shade to Huma rise,
Beyond the wild, impartial skies."

Tram seeing the destruction walks up next to Hort and bows his head. “Those poor people. May they rest in peace. “

After some time passes, the rest of the caravan you were traveling in arrives.  The head of the caravan offers to take the bodies to Vogler for burial.

Does anyone have anything else they want to do here before departing?

Hort gets inspiration for the burial song.

EVERYONE, you are now 2nd level!!

Jushu looks around, then concentrates for a moment, casting detect magic (not as a ritual). He will then examine the wagons and the corpses of these creatures to see if he finds anything.

No magic detected