Leareth's mage sense and thought sensing tell him that there is a Girl partly made of magic along with a Cultivation spren bonded to her by the 3ed Ideal

"We shall see about that," Dalinar growled. "Answer the question. How did you get in here?"
Leareth's gaze settled on Wit. "An old acquaintance let me in, though he did not realize it at the time."
Wit's eyebrows rose. "My, my. What an unexpected guest." His tone was light, but Dalinar caught the tension in his posture.
"You know this man?" Jasnah asked Wit.
"We have a... history," Wit said. "One might call him an old friend, if one was feeling rather generous."
Leareth's lips quirked. "Come now, you were always rather stingy with your generosity."
Jasnah took a step forward, her brother Amaram tensing beside her. "Enough. You claim to have urgent matters to discuss. Speak, then, but know that you are unwelcome here."
Leareth bowed his head in acknowledgement. "Very well, Your Majesty. I have come to warn you..."
He trailed off, eyes narrowing as they settled on the doorway. Dalinar turned to see Lift peeking into the room, eyes round as saucers.

if Leareth can target a gate bast on Holds magic without him knowing. that is Worrying but nevertheless, Leareth's arrival is better than the last 2 surprise World hoppers he has had to factor into his plans the Ghostbloods and by extension, their leader Kelsier was bad enough but Nightblood could be an outright disaster at least Leareth can be relied on to side with the radiants agents Odiham

looks up britle "ah Lift you do seem to have way of finding your way in to these meetings well you might as well join us at this point"

Lift blinked at Wit, then edged into the room. She shot a wary glance at the stranger--Leareth--and sidled up to stand next to Kaladin.
"Lift is one of the Knights Radiant," Dalinar explained to Leareth. "You were warning us of something?"
"Yes," Leareth said. He focused back on Jasnah. "There are disturbances in the Cognitive Realm and the Spiritual Realm that suggest something dangerous is approaching. The spread of the Everstorm and the return of the Voidbringers is attracting unwanted attention from other worlds and other powers. A malevolent force seeks a foothold in Roshar in order climb up the Realms and threaten the very fabric of the Cosmere."
Jasnah's eyes narrowed. "The Cosmere. You're implying this threat is extra-Rosharan."
Leareth nodded. "Just so. The rise of three new Shards on your world and the upheaval of powers long settled has sent ripples through the Realms and beyond."
Dalinar and Jasnah exchanged a glance. The "Shards" and "Cosmere" this stranger referred to were things Wit had hinted at before. Things far beyond their current problems.
Kaladin glanced at Wit. "Do you think he's telling the truth?"
"Unfortunately, I have no reason to doubt him in this," Wit said grimly.
Lift wrinkled her nose. "Somethin' else out there wants to hurt us?"
"So it seems," Leareth said. "And this force makes the Fused and the Singers seem a trifling annoyance by comparison."

"Autonomy!"

"Autonomy!" Wit spat the word like a curse.

Jasnah frowned. "What does that mean?"

"It's the name of a Shard," Leareth said. "One who desires independence and control, and does not appreciate interference from others."

"You speak as if these 'Shards' are people," Amaram said.

"In a way, they are," Wit said. "Vast powers with minds and wills of their own. Autonomy rules many worlds, intent on keeping them separate and under their sole control."

"And this Shard is coming for Roshar," Dalinar guessed.

Leareth nodded. "Autonomy will not tolerate the fusion of powers here as the three Shards of Adonalsium have come together. The Summoning of the Heralds and the newRadiants threatens Autonomy's control. And so, Autonomy seeks to gain entry to your world to assert dominance, absorb the other Shards, and prevent further meddling in their affairs."

Jasnah's frown deepened as she processed this. "You make it sound as if this...Shard...is almost a god."

"In a way," Leareth said again. "The Shards bear powers that could be seen as divine. But they are not omnipotent, and they have their flaws and weaknesses. I have witnessed what happens when a Shard grows uncontrolled in their intent. It would be a disaster for Roshar."

Dalinar steepled his fingers, mind whirling. Threats from without and within, dangers on a scale he could barely comprehend. Where did they even start? But one thing was clear...

"It seems our work is not yet done," he rumbled. "The Unification shall continue - we have more than the Fused to stand against."

"Autonomy!"

Kaladin nodded along with Dalinar. The threats kept piling up, but if there was one thing he had learned in his life, it was how to stand up against overwhelming opposition.
"Thank you for the warning," Jasnah told Leareth. "We will be on our guard. For now, I must ask you to leave us. We have much to discuss."
Leareth bowed again. "I understand. I wish you the best of luck in the coming struggles." His eyes lingered on Wit for a moment, then he vanished from the room as suddenly as he had appeared.
Lift scratched her head. "The bad guys just keep comin', don't they?"
"Such is the fate of those who seek to change the world," Jasnah said. She looked to Wit. "You called this Shard 'Autonomy'. You know more of these powers than you have told us."
Wit sighed. "The workings of the Cosmere are vastly complex, and not easily summarized. But yes, I am more informed about the Shards and the Realms than I have hitherto revealed. If we are to face threats from that level, you will need to understand."
"Then enlighten us," Dalinar said. "We need to know what we're up against."
Wit shook his head. "That will take a great deal of time and explanation. For now, know this: the Shards are immense powers with goals of their own. Autonomy desires control and independence above all else. There are others with contrary intents that may yet stand as allies against them. And the host of each Shard - the person who took up that power long ago - still influences how that Shard manifests in the Cosmere."
"You speak as if you have known these Shards for a long time," Amaram said.
Wit smiled thinly. "I have witnessed the Shattering, and the Shards in their infancy. I was there when the Cosmere began, and shall likely still remain when it ends."
Jasnah's eyes widened. Dalinar felt a chill, pondering just how old his friend Wit truly was, and what depths of knowledge he held locked away inside his mind. There seemed no end to the secrets on Roshar.

Nightblood Messages Leareth as soon as he appears nearby Szeth's cell

 <Hello! Would you like to destroy some evil today?>

The room fell silent as they absorbed Wit's words.
Finally, Jasnah spoke again. "This Autonomy wishes to exert control over Roshar. You believe they intend to absorb the powers of Honor, Cultivation, and Odium that have been Splintered and reforged here."
Wit nodded. "Domination and control above all else. Becoming the sole Shard at work on your world would suit Autonomy's agenda."
"And they would do this how?" Amaram asked. "Could they overpower the other Shards by force?"
"The powers of the Shards are often subtle," Leareth said. "Autonomy would more likely try to manipulate events to its advantage, sowing conflict between the other Shards or undermining them in covert ways. Absorbing a Shard by force is challenging, even for another Shard."
"How reassuring," Jasnah said dryly.
"What can we do to counter this?" Dalinar asked. "How do we defend against a threat like that?"
"Awareness and cooperation are your greatest weapons," Wit said. "Autonomy prefers to work through misdirection and stealth. Know that there are unseen forces at play, and seek the truth behind puzzling events. And continue your alliance with the other Shards present on Roshar - Unity is key."
"Unity," Dalinar mused. He glanced at the tower windows, glimpsing the expanse of Urithiru leading to the hearts of the Shardbearers. Unity was something he understood.
"We stand together," he said, meeting Jasnah's eyes. "All of us here, and with our allies among the Shards. Whatever comes against us, we will not be divided."
Jasnah smiled. "Well said, Uncle. The threats are numerous, but so too are our strengths." She looked to Wit. "There is much for us to discuss regarding these Shards and the Cosmere. But for now, we have a war to win. Let us return to our duties with new vigilance - and new purpose."
Dalinar nodded firmly. Together, they would stand against any threat. The Unification would not be halted.

Szeth holds the sword Nightblood closer  "sword-nimi! Dalinar told you not to talk to random people"

   <he's different> Nightblood says

    "I certainly a" Leareth says with a smile as he appears in Szeth view 

    Nightblood repets <Would you like to destroy evil?>

Szeth stared at the strange man who had appeared, internally cursing his luck. As if he didn't have enough to deal with, watching over this undead tyrant and his captive blade, now more strangers with mysterious powers were intruding.
"Be at ease, Szeth-son-son-Vallano," Leareth said, raising his hands. "I mean you no harm. I have come to speak with Nightblood."
The sword vibrated eagerly in Szeth's hands. He grimaced but did not release his grip.
"No destroying anything today, sword-nimi," Szeth said firmly. He looked back to Leareth. "Who are you, and how do you know these things?"
"I am called Leareth. I know much, but not through any power or skill of my own." The man's eyes crinkled. "Merely the accumulated knowledge of millennia, and a tendency to be in the wrong place at the right time."
"What do you want with this sword?" Szeth demanded. Nightblood was trouble enough without mysterious strangers taking interest in it as well.
"An old acquaintance sought its power for wrongful ends," Leareth said. "I would ensure that does not come to pass. This sword is dangerous and should not fall into the wrong hands."
"I have it well in hand," Szeth said. "Be on your way, stranger, and do not meddle in affairs that do not concern you."
Leareth eyed him for a long moment, then dipped his head. "As you wish. But know that I shall be watching, Szeth-son-son-Vallano, and if need arises I may call upon you and the blade you bear."
Before Szeth could respond, the man vanished. Szeth sighed, adjusting his grip on Nightblood. He didn't know who or what Leareth was, but one thing was clear - there were more and more powers seeking to steer the course of events on Roshar. He could only hope that he and his allies proved strong enough to stand against them.

meanwhile in the meeting room 

"Autonomy's force have technologically that fare outstrip any know ever know on Roshar and her Men of Gold and Red are as powerful as the Fused and Radiants but due to the difficulty controlling them that are much more dangerous"

Wit's revelations left the group shaken and solemn. Men with powers like the Fused...and possibly surpassing them. The Fused had proved deadly enough, striking at the heart of the coalition's leadership. What havoc could these "Men of Gold and Red" create?
Dalinar stared out the windows, lost in thought. Things had seemed almost hopeful after their victories in Kholinar and Shaldara, driving the Voidbringers back and claiming crucial territory. But this news threatened to plunge them back into desperation.
Jasnah finally broke the heavy silence. "We will have to plan and prepare carefully, if we mean to counter such forces. Wit - you know more of these enemies and their capabilities. I task you with instructing our Radiants and generals on their weaknesses and how best to face them, should they emerge."
Wit dipped his head. "As my Queen commands. They are formidable, but not unstoppable. And we have our own advantages, with the reforged Shards behind us and our troops ready to stand as one."
"Good," Jasnah said briskly. "Then let it be done. We have much planning and training ahead, but if we are vigilant and proactive we can overcome."
"Your Majesty is wise, as always," Amaram said, pride in his voice. "We shall not falter against this new threat."
Jasnah met Dalinar's eyes, a question in her gaze. He gathered himself, standing straight and nodding firmly.
"We knew this fight would not be easy," he said. "We will do as we have always done - prepare, find our weaknesses, and emerge stronger. The Blackthorn himself could not stand alone, but the Bondsmith will not fall so long as his allies remain at his side."
He raised a gauntleted fist, light glinting off his Shardplate. "For unity!"
"For unity!" came the answering shouts around the table. The path ahead was shadowed, but their resolve held strong. United, they would weather any storm.

Dalinar's out-would conference masked inner concern he focuses on his connection to the Stormfather 

    <what do you know of this Autonomy>

<HONOR RARELY TALKED OF SHARDS OUT SID OF ROSHAR BUT WHEN HE DID AUTONOMY WAS CHEFE AMUMG HIS CONCERNS> 

The meeting adjourned, but worries lingered in Dalinar's mind. He made his way to the temple at the peak of Urithiru, seeking solace in the rhythmic pulses of the storm.
Through the bond, he continued his discussion with the Stormfather.
the Stormfather rumbled.
Dalinar leaned on the balcony overlooking the open sky, pondering his next moves. Autonomy wished to dominate, but in truth Dalinar needed no Shard's control. He led as a Bondsmith should, guiding and strengthening, never forcing compliance.
Jasnah and the other rulers looked to him for answers, but he would make no unilateral decisions. All were equals here in their purpose. Working as one towards the greater good - that was the only way to stand against this threat from beyond.
He smiled, blinking into the storm. Yes, Autonomy would find no divided enemies or weakened prey on Roshar. The coalition would stand united, knit together in bonds far stronger than fear or control. Their strength lay in trust, in compassion, in the willingness to stand as one. Dalinar had faith that would prove enough, against any who sought to dominate.
The storm rumbled in time with his heartbeat. Unity. Purpose. Strength.
They were ready.