Hadrian is surprised to hear the druid so readily agree to the half-cocked plan, but he isn't about to try and talk her out of it now. "Let's see if we can find somewhere more out of sight." He says, moving east along the south side of the buildings until he can get a decent look along the east wall of the manor grounds. He's checking for two things:

1. Any raiders that could see them.
2. If there are any of Myrren's defenders or windows they could pop up from along that side.

Perception: 23 with Devil's Sight - You can see normally in Dim Light and Darkness—both magical and nonmagical—within 120 feet of yourself.

Xari is just about to object that yeeting a sentient snake over Lord Myrren's walls seems like a dubious proposition at best when Snevelyn unexpectedly agrees it might be worth a shot.  The big man's jaws snap back shut and he ruefully lumbers after Hadrian, trying to make the best of his own lack of darkvision.  When he has a moment, he whispers down, addressing the serpent coiled around his arm.

"You and I, we're not as persuasive as the nobleman and the merchant, but I'm thinking that this Lord Myrren sounds like the honorable sort.  Doubt he'll just attack a young elven woman on his grounds, even at a time like this.  I know you know, but just remember Nighthill sent us from the keep, and their Dragonchess tally stands at 9 to 8."

The wall itself is about is about 7 feet tall - high enough to make it annoying to get over quickly, but not so much that it's outright impossible. 

Hadrian
You and the others slid around the front of the buildings on the east\west road leading further into Greenest, around the large burning building casting light over the area. With your gifted vision, you can easily make out a group of raiders sidling along the east wall, heading north. There are five living members, three kobolds and two cultists - a third robed figure lays on the ground a few feet from the wall, an arrow sticking out of them. 

"Dammit." Hadrian says, clicking his tongue. "Looks like they've got archers watching the east wall too...At the very least that group of raiders should move out of sight soon. We might need to zig-zag out way up to the wall if we want to get Evelynn over though."

Xari grunts and thinks for a moment.  "Or we could just take off our disguises and attack the raiders at the east wall.  That could show the archers we're on their side?  Hopefully without attracting the attention of the other raiders to the south."

The big man peers at the wall.  "Only seven feet... once over, Evelyn could throw a rope and we all climb...  dunno why the raiders haven't themselves."

If it appears there is enough surrounding noise and distraction to do so safely, Xari casts Blade Ward on himself once more.

"Probably because they've been getting shot full of arrows every time they try." Hadrian replies. He eyes the small raider group on the east wall, then shrugs. "That works too."

"Aimon could you toss me one of those potions we found?" The nobleman asks as he starts to pull the robes up over his head.

"Yes, of course," Aimon says quickly, offering one up. He also holds the rest out for anyone else to take should they need one.

He then slips his cultist mask off and removes his robes, ready to follow the others toward the wall when the time comes.

"If we wait until the raiders are gone, we could reveal ourselves to the watchers on the wall and ask them to help us over," he suggests, though secretly he hopes to see Snevelyn thrown over the wall.

Snevelyn swivels her head towards the sorcerer.  "Lesss believable if we leave them alive."  

"Right then."  Xari mumbles, following suit and removing his disguise.

"Second serpent throw, over the wall.  First serpent throw, in a cultist's face.  I think I got it."

Still concentrating on Blade Ward, the big man prepares to lead the charge against the raider wall patrol.

OoC: Everyone go ahead and roll initiative. Snevelyn, when you get thrown in someone's face...If you're trying to land on them or something make an Acrobatics or Athletics check, otherwise you'll just land at their feet.

Hadrian takes the bottle gratefully, popping the cork and downing the red liquid in a quick swig(7 points healing). He'll follow after Xarian as the big man steps out...Hurried if they need to be to avoid arrows, but not with a weapon raised at the patrol, thinking they might just consider them reinforcements until it's too late.

Initiative: 8

Aimon hung back as the others prepared to charge forward, multicoloured energy slowly building between his fingers. It crackled from the sparking blue of his lightning to the pulsating purple of mind-breaking magic to a red-hot glow of fire. He was beginning to master the well of magic within him.

Initiative: 12

[Initiative]: 12

Xarian's Initiative:  11 (he can also swap Initiative with a willing ally at the start of combat if it makes sense).

The big man holds his Greatsword, +1 in one hand but low as he runs.  Ready, but not obviously threatening.  Ambiguous.  Snevelyn-bearing arm free.

"Got an update.  From the keep," he announces, unclear whether he is addressing the raider patrol or Lord Myrren's men behind the walls.

"You recognize this ginger elf behind me?  Well, you really should."

The four of you step out - and the raider patrol all freeze and turn their heads as Xari announces your presence. They look confused, but not alarmed yet...

Xari, Evelyn, and Aimon.

Xari breaks into a run towards the halted patrol, Greatsword, +1 swinging in his right hand and Snevelyn coiled hidden on his left arm.  He projects his voice in such a way that either the raiders outside the wall or Lord Myrren's men inside might think he is addressing them, delivering his somewhat cryptic words with a serious, neutral expression, as if he has run across town with this message.  Addressing his final words directly to the closest raider.

"So like I was saying.  News from the keep.  DRAGON-chess stands at nines and eights, yeah?  We're here to help.  The ginger elf behind me's got some key intel about the tiefling woman and... say... you ever hear about how time is a serpent biting its own tail?  Turns out, you're the tail... CATCH."

And with that, he casually tosses the serpent that is Evelyn underhand at the nearest raider's face.

Movement and Action:  Xarian dashes 45' NW and 15' N, ending up just 5' SE of the nearest raider patrolman.
Free Action:  (After delivering his little speech), Xarian tosses Snevelyn at the nearest raider's face.
Bonus Action:  (None)

Xarian is still concentrating on Blade Ward.

Snevelyn hisses as she flies through the air like an S-shaped arrow, trying to coil around the neck of the kobold she's thrown at and sink her fangs into its neck.

[Action]: Bite to hit: 17, damage: 3 piercing, 6 poison
[Acrobatics]: 17

"It's me, Aimon of Perynor's Gilded Legder," the elven merchant announces as he steps toward the walls, hoping someone atop them might recognise the name if not his face.

He considers using the secret phrase that Nighthill had given them, but decides maybe he shouldn't risk revealing it to the raiders.

Instead he sends a glob of caustic-looking green gunk at the farthest cultist. The goo splashes against them, sizzling flesh and fabric alike.

Aimon grimaces in horror. "Maybe not that one..." he says more to himself than anyone else.

Movement: 20' N, 10' W
Action: Sorcerous Burst. Attack: 24. Damage: 5 acid.

The kobold screeches something like a curse in draconic as a literal snake is thrown in its face. Its scream is cut short as Snevelyn's fangs sing into its throat, spreading venom directly into a major artery. With an unceremonious thud, the small draconic humanoid collapses onto the ground. One of the robed cultists yells in surprise as an orb of green goo splashes over him, poison (or acid?) seeping into his skin. 

Both he and the other cultist step forward, slashing at Xarian and the snake with their curved blades. But neither finds their mark. One of them(b) had stepped away from the side of the wall to try and deal with the big man - and in doing so left behind its protection. An arrow catches them in the throat from above, and they fall.

Rox sprints across the open field, heading straight for the cover of the wall.

Had!

Hadrian runs lightly onto the field, stopping to hurl a bolt of crackling red energy at the cultist who tried to slice into his least-hated snake.

Movement: 30 NW
Action: Eldritch Blast (12 to hit), (9 force damage)