Silas will try to move so he can line up as many as enemy he can and unleash Lightning Bold from the Ioun Stone.

Dex Save DC: ? (DC is determined by original caster which I dont know)

Damage: 25

Mal will target the 1st Snake body in the line (the one farthest away from him) and take aim with his Crossbow.

Heavy Crossbow: Attack: 20 Damage: 5 Sneak Attack: 9

With Assassinate ability auto crit damage: Crossbow: 1 Sneak Attack: 8

Then I Mal will use her Action Surge and attack the same target (if not dead) or attack the 2nd Snake Body.

Heavy Crossbow: Attack: 26 Damage: 11

Assassinate auto crit 2nd attack damage: 1

Not sure if I still get the Assassinate Ability but I think I do as they have not gone yet and are still surprised (maybe, let me know.)

And then Mal will creep 30' to the NE and hide behind that other wall and attempt to hide as a bonus action.

Stealth: 25

Before combat, Badger casts Mage Armor on himself.

Badger will use the first round to cast Detect Thoughts from the Helm of Telepathy on one of the SnakeHead or SnakeBody people, preferably one that it relatively intact and hasn't yet been stabbed, shot, or struck by lightning too much. Use the Portent roll of 4 as the saving throw.

Jumping ahead: Badger will plan on using helm again next round to cast Suggestion on same target, suggesting that the snake-people are grossly outnumbered, that it should drop its weapon and flee, and call for its allies to do the same. Use the Portent roll of 5 as the saving throw.

Grenk let's the lightning pass and then rushes forward with shield and sword crackling with reddish electricity.  He moves towards the snake body on the far left and will take two swings with his sword.

Attack 1: 21 Damage: 10 plus 5 lightning

Attack 2: 26 Damage: 15 plus 2 lightning plus lightning crit 1

Sickle Init:   21

Sickle Stealth:   16

Sickle waits behind his wall, his mind racing between the ring and his other choices.  What to do, what to do...?

As the silence of the jungle ruins is broken by the crack of lightning and the hiss of arrows and bolts, Sickle reaches forth his staff.  One of the snake-people looks down as a trickle of water runs past his feet, rising to his ankles, then he turns and looks up as a giant wave crashes into him.

Action: Tidal Wave Dex Save DC15 or 21 bludgeoning damage and knocked prone, half damage and not prone on success.  Starting at the front of the line and working backwards.

If they are still around next turn, he will target a group of them away from the wizard and guide with Call Lightning. In a 5ft area around a point, Dex Save (disadv if prone) DC 15, or 22 lightning damage, half on success.

Silas dashes out of cover as the snake folk pass and the unassuming stone that has been slowly bobbing about his head unleashes a blast of lightning through the snake folk to the south side of the group. 

DC 17 save:  Human:  12,  Human:  10,  Human:  19,  Snake Head:  7,  Snakebody:  7

The smell of ozone fills the air as the bright flash of electricity rips through the air, and snake people alike, a glaring bright streak of energy that scorches flesh.  

Two heavy bolts rip through the air slamming one, then two, into the lead snake bodies warrior who screeches in pain and they rip deep into her flesh.  He doesn't fall, but looks grievously wounded. (OOC: No 2nd assassinate. You can only assassinate if you go before them in initiative, and even though they don't get to act, they do get their first initiative int the first round.) 

Badger, you listen in the snakeheads thoughts, "Maybe if Ras Nsi hears me take credit for the killing the wizard there will be a promotion to scale clan. It is a shame we could not eliminate these, my sword was at his throat...alive..what ridiciulous orders, who cares why they've come."   You make your suggestion, sending it deep into his psyche. You already know he won't be able to resist. The snakehead (SH2) to the north looks around in a panic (but hasn't had a chance to move yet).  

Grenk, seeing that the lead snake person has two crossbow bolts sunk deep into it's flesh and blasted by lightning, and barely standing, he charges the one at the back of the group instead, leaping with his blade, laying into the snake man, sending blood spraying from his blade.....though the creature is still alive.

And then, the rush of what seems like an instant waterfall erupts from nowhere, blasting through the entire ranks, splashing away before washing over the final snake person. 

DC 15 save:  Human1:  7,  Human2:  19,  Human3:  17,  Snake Head1:  18,  Snakebody1:  19.  Human4:  10,  Human5:  19,  Human6:  13,  Snake Head2:  20,  Snakebody2:  16

DC 15 Save: Thay wizard:  9, Guide:  6

When the blast of water has suddenly washed through the crowd, half the Yuan-ti are on the ground along with their prisoners. The lead snake bodied warrior is down, his snake body limp and unmoving amidst the water rushing away into the grass.  Ominously, while the column of snake warrior folk are still gathering themselves, the sky goes dark as a black thundercloud rapidly forms over the battle....crackling and the rush of wind fills the sky.  A blast rips down, more lightning to rip through air and flesh. The white light strikes the water sodden ground sending mud and rocks spraying as the four nearest Yuan-ti are covered in blue and white energy that tears through their bodies. 

Dex saves DC 15 : Snake Head 1 (prone) - 11, Snake Head 2 (standing) :  21, Human 4 (prone) - 6, Human 1 (standing) :  20

The prone snake head man stops moving as he feels the full blast of lightning.  

Alright, everyone (except Sickle who has already taken his) can take your 2nd turn. 

Solid red is unconscious / dead. 

White outline is 'normal'.  Light blue outline is 'prone', and green outline is 'fleeing'. 

Badger will stick with his original plan. Not sure if the target will convince anyone to follow, but might be worth a try. Otherwise, taking one out of the fight is worth the effort of two rounds.

[OOC: roger that on Assassinate. Then assuming I have advantage cauz of stealth will roll attacks with advantage, otherwise just take first roll]

Mal will put away her crossbow and ull out her Rapiers as she runs out to stand north of Grenk and attack H6 with her Rapiers.

Rapier #1: Attack: 24 Damage: 12 Sneak Attack: 8

Rapier #2: Attack: 12 Damage: 10

Silas throws a Sacred Flame at SB2.

Dex Save DC: 14

Damage: 2 <---(...this is 2d8 and i got snake eyes)

(lightning bolt still deal half damage on successful save right?)

Grenk will raise his lightning sword again and lash out with it a the snake bodied creature.

Should the first strike end him, he will move up to H6 so as not to incure an AoO

Attack 1: 19 Damage: 7 plus 5 lightning

Attack 2: 16 Damage: 5 plus 3 lightning

Copied roll tag above and forgot to remove the advantage here are the new ones since the mouse over option doesn't work.

Attack 1: 9 Damage: 4 plus 6 lightning

Attack 2: 11 Damage: 11 plus 6 lightning

(OOC: Silas: yes, lightning bolt still deals half damage on successful save, the lower half of the enemies were all hurt.)

Mal rushes out of the darkness like a viper her rapier slashing through the female human with patches of scales on her back. Blood sprays and the woman shrieks in pain, still shocked by the sudden onslaught, ear ringing, eyes flooded with light.

Grenk continues to battle the snake body man who is at the back, and barely aware of the attacks as the lightning sword slashes twice into it, leaving blue crackling energy cascading along his flesh...yet he stands, even as a thin blade of light slashes into him from Silas' spell.  DC 14 Dex save: 15

Finally, as the brutal surprise attack hits home, the Yuan-ti party reacts.  The first thing to happen is the snake head man screaming, "Ambush!!  Flee!!!"  He bolts to the north west.  The others, brutalized and badly injured seem to agree with him, the entire group flees in different directions. H5 and H3 have the a backpack each from the prisoners. Since many have to stand, they don't get as far as others.

Ok, everyone's next action.

Silas aims and fires a Guiding Bolt at H5.

Attack: 20 Damage: 18

. Note to party, next attack against H5 will be at advantage. 

Sickle sees the group scatter and he reaches his staff up again, and again a thunderous bolt flashes from the sky, striking H3 if they are still in range, plus any one in 5 feet of them.

Using a follow up from my Call Lightning DEX save DC15, or 15 lightning damage, half on success.

Grenk was impressed with how well the ambush was working and then saw that while they were scrambling several had backpacks.  If the cubes were in either of them then they may have to assault where ever they were camped out at.  Grenk slashed once more at the creature in front of him and then turned to take off after one with a pack and swing at him saying "Drop the pack and you'll live another day."

Attack 1 SB 2: 22 Damage: 9 plus 4 lightning

Attack 2 H5: 20 Damage: 8 plus 6 lightning

I understand that this movement may cause AoO, should one hit he'll utilize his stone endurance reducing damage by 15

Sorry, a bit laggy posting this updated tactical map. Forgive the tiled background. :-p. 

Grenk, the one in front of you disengaged and dashed a short way away. (and then gets blasted with lightning and taken out...so...) Let me know how you'd like to modify your action.

And ignore my error!! H5 is the one with the backpack, not H4!!

Silas, your silvery bolt flashes through the jungle slamming into the back of the human with the backpack to the north...he stumbles but keeps running, now surrounded in a nimbus of light. 

Sickle, the only enemy still in range of your spell is SB2, the long snake creature that slithers past Badger, surprised by his presence but not stopping to think about it. 

DC 15 Dex save : 15

The blast of lightning rips through the sky, right near Badger, with a thunderous boom.  Badger, your ears are ringing, your vision dazed, and you smell acrid ozone, and mud and dirt splatter you, but you're uninjured.  The snake creature is throw by the zap and it's limp body thuds down amongst the weeds unmoving. 

The wizard points both his bound hands towards H3, a human male, topless, with a jade necklace and sarong made of blue green fabric, with a blade at his side and bow on his back, who glances back with his yellow snake eyes, and shouts, "My backpack, don't let him get away!!"  

[OOC: Would I have gotten an AoO against H6 as it fled?if so...]

AoO Rapier: Attack: 23 Damage: 8

Then as my action again I would drop my Rapiers and pull out my Crossbow again to shoot at H5: Attack: 22 Damage: 11

"What's in the bag?" Silas questions.