Zane actually will use his reaction for Cutting Words in an attempt to reduce the Guard 2 hit on Jarsali to not hit: rolled 6 in the game log, which should turn the 22 into 16 and hopefully a non-hit.

He stage-whispers, "SURROUNDED! We are everywhere!"

(Note for Tex, guard 4 is killed by Bellamy's attack)

„Let’s go to Jarsali, Liz!“ Tex calls out and moves to intercept and mount Lizzy on their way to dash towards Jarsali and into melee if possible. During the ride, Tex brandishes his spear and hurls it at the nearest guard.

End of turn.

Tex with another precision strike on a guard. His spear strikes true once more. (I am good with that movement for Lizzy mounted)

Zhelezo 1 through 3 run over towards the eastern exit and form a wall, each of them using a [Tooltip Not Found] to get over there.

Zhelezo 4 and 5 each unleash a crossbow bolt with one of them connecting with Guard 2

Zane and then Lana are up

Zane listens very carefully to catch if anyone else might be approaching after the warning was given (listening as an action, can't move this turn). Perception check: 25

He'll also be ready with another Cutting Words (rolled a 1 in game log).

With the injured Zhelezo on his feet and the closest cultist taking care of, Lana returned to the fight. Cultist number 2 looked like a very convenient target rarely open and preoccupied - and she tried to use the advantage:

BA: Moving Hunter's Mark

Action: Attack: 17 + 3 (Bless) Damage: 10 + 4 + 2

Movement: out of water, below Zhelezo 4

End of Turn

As Guard 2 is hit with Rel's eldritch beam, he is launched back, it is this moment that Lana sees an easy opening and unleashes an arrow, piercing the heart of the enemy which then falls lifeless to the ground.

Zane, you do not hear the sounds of any reinforcements at this time. 

Jarsali and the remaining Guard are up

Jarsali, using her large frame, stands in front of the remaining guard and wraps her arms around his waste, grappling him. 

The guard attempts to avoid the grasp but Jarsali's strength overpowers and holds him tight. Nonetheless the Guard seems to smirk as he pulls a pouch from his robes. "You will not succeed here!" the guard barks as he grabs from within the pouch and throws a fine, crimson powder into both his and Jarsali's face. They both fall like ragdolls to the ground, motionless.....

Kind of as a reaction - would Zane recognize the crimson powder and the effect that followed just based on his knowledge of all kinds of stuff? History check: 14.

He stays motionless for the moment, waiting to see if the dust settles or forms a cloud or something

(This is nothing you would have seen before) 

Zane, looking at them, you can see that whatever wasn't inhaled by them has not formed a cloud. The remnants fall to the ground, almost like if baking soda or something that fine was tossed in the air, lingering for just a moment before slowly falling to the floor. 

"The Ruidium, such as what impaled Tex's hand, was crimson in color, was it not?  Did this guard and Jarsali just inhale Ruidium powder?"

Rel searches the guards' bodies and pokes gingerly at the guard's robes and pouch with her shortsword to confirm the color of its contents.

"I have simple healing magic, but I do not know if that is enough to revive Jarsali.  We must keep moving east, but we cannot just leave her here.  If someone wishes to briefly examine her medically, I can provide divine assistance."

Rel will cast Guidance on anyone that performs a Medicine check on Jarsali.

"Or... we could send one or two Zhelezo back up the waterfall with Jarsali's body while we continue on."  Maybe the drunkard.  Would not hurt to lose him.

"Why not both?" Lana bent over Jarsali checking her vitals and signs of poisoning. ( Medicine check: 22 (nat 20!))

"Not sure, how he will climb the rope with the body but we are not leaving the Queen here."

Lana, you look over Jarsali and can easily tell that she is still breathing and just in a state of sleep. A sleep similar to when you had seen Tex touch ruidium and go still while he experienced a vision. You see her body twitching and convulsing slightly. Meanwhile, the robed figure looks the same. Suddenly they both stop. You touch your hand to Jarsali's chest and still feel the movement of breath, in and out. You touch the guards chest and feel many sharp spikes, pulling the robes back you see dozens of small crimson spikes, similar in look to that of Tex's hand though much smaller in size. Jarsali slowly opens her eyes while the Guard remains still, seemingly deceased.

She does not say anything, just lies there, sweating and breathing heavy

Zane breathes a sigh of relief, "Oh, welcome back."

He continues, "I saw the main woman go that way," and he stops, realizing that he's still invisible. He drags the corner of the guard's cloak with the toe of his boot. "I'll scout ahead a bit."

He heads that way and starts exploring. Stealth check: 21

Bellamy stares at the strange crimson powder and sighs with relief when Jarsali eyes open. "Yes that does seem to be Ruidium though I am surprised they turned it into a suicidal weapon"

"Anything can be a weapon, just needs a bit of imagination. And judging by Tex's hand, that stuff was already unhealthy." Lana squatted down near Jarsali. "Need a potion?"

Should Jarsaly nod, Lana would give her the health potion but if not, simply wait until Queen Bee feels better (and Zane reports his findings).

Jarsali coughs while continuing to breath heavily, "No I....I just need.... a moment.." She wheezes a bit before eventually sitting up. "Tex, I believe I saw something similar to what you may have witnessed, a vision or perhaps just a dream? Though in my dream there was not a man but a boy, born into a life he did not choose. By being born under the full crimson light of Ruidus during the Calamity, the people of his village were suspicious of him, thinking that perhaps he was the offspring of a Betrayer God. Though his parents did not believe that to be true..... that is all I remember." She continues to breath heavy but now stands, "I know not what any of this means. All we can do I think is continue on..."

Zane, you head out the Eastern exit of the area, the path narrows once more to a tunnel. You walk for a bit without seeing or hearing anything telling of what is ahead. ((How far do you want to walk? For now I'll say you've walked about 5 minutes ahead(at a slower pace due to stealth of course))

Zane will try to assess which way the tunnel is heading and if it's sloping down or up.

Then he will turn back, also stealthily.

Once he meets up with the others (either back in the cavern or in the tunnel), he warns, "It's me, Zane, still invisible. Hold on for a moment."

He continues, "It seems safe, but also empty. I went for a few minutes and it's just a tunnel. I'm not sure it's going the same way as the water... we know the water was transporting the crates somewhere important. But also that the woman went down this tunnel. Then again we've seen enough people teleport around that it's not too important which way they started walking."

D20 roll for trying to figure out if the tunnel would lead to the same place the waterway could: 13 (survival would be +5, for example).

Zane, it appeared to slope down and was mostly straight with a curve or two in there, always turning back towards an eastern direction though

Rel exhales a breath she did not know she was holding as Jarsali stirs.  Wait, did Lana just call Jarsali "The Queen"?  I wonder what that means...

Out loud, Rel suggests:  "We need to keep moving, if you feel up to walking Jarsali.  All these strange Ruidium effects and the moon Ruidus is almost full above us.  Lord Agustin's cultists are likely completing their ritual, whatever it is, very soon.  We may not be able to see Zane as he scouts since he is invisible, but if we move in that direction at a measured pace, he may have an easier time reporting back to us."

She pauses a moment.  "I suppose we just leave the corpses of the four guards here?  At this point, with one of the guards using a sending stone of their own, our element of surprise is gone anyway, so nothing for it but to proceed quickly to the east.  Agreed?"