Powerful psykers are capable of foreseeing certain dangers in the future, allowing them to avoid these threats and choose a future most advantageous to themselves.
For example, take Mephiston, Chief Librarian of the Blood Angels Chapter in the 40K era ten thousand years later. He possesses formidable powers of precognition, he can foresee attacks from the forces of Chaos, the Tyranid swarm, and even predict their exact numbers.
His most outrageous battle saw Mephiston summon both his future self and his past self to fight alongside him, forming a trinity of himself.
With his mighty psychic telekinesis, he could crush the brains of every Ork on half a planet in an instant. Such power far surpasses even the Imperial Custodes.
This shows just how great an amplification and support role psychic power can provide in battle! To put it bluntly, the advantages of psychic power are even better than ki in some ways, though using such power carries far greater risks.
Magnus, hailed as humanity's greatest psyker after the Emperor himself, and the only one who could possibly sit on the Golden Throne in the Emperor's place, had already foreseen everything on the eve of the Battle of Prospero, even before Leman Russ, the Wolf King, arrived.
Russ, while not a master psyker like Magnus, wasn't without psychic power himself.
During the Battle of Prospero, Russ unleashed his psychic might.
All the Primarchs showed, to some extent, the ability to sense danger or even catch glimpses of the future, some, like Sanguinius, could even directly see their own death approaching.
"Russ, you saw something, didn't you? You had a psychic premonition?" Axis asked.
"That's right! I saw something that surprised me. My father, the Emperor, hates deceit above all else, and whatever I sensed has a significant effect on him.
"Just as you were inside picking things out, my mind was going crazy with alarms, though I'm not sure if that's the precognition you were talking about," Russ said, shaking his head.
His ability to sense danger was always hit-or-miss. Back when he was raised by the she-wolf, this warning sense had helped him survive crisis after crisis.
When his adoptive father found him, and when the she-wolf was killed, he had sensed it coming.
He'd had the same feeling days before the Emperor's arrival.
Once or twice could be coincidence, but if it happens countless times, you can't ignore it anymore.
"In that case, I understand. Aside from one locked case, we'll take everything on this ship with us," Axis decided in the end, choosing to trust the Wolf King.
Compared to the Emperor, his own cunning was still lacking, his 'fishing' ploys might easily displease the Emperor.
After all, he'd just been an ordinary person before crossing over, while the Emperor had lived for hundreds of thousands of years. When it came to wisdom and insight, the Emperor was absolutely one of the best in the galaxy.
Trying to play little tricks in front of someone like that was pointless.
Instead of petty games, it was better to be open and aboveboard, that was the surest way to win the Emperor's favor.
"Axis, you need to remember one thing, from today onward, you are a native-born child of Fenris."
Russ, the Wolf King, squatted down in front of Axis, speaking with deep meaning in his tone.
"I've already issued a gag order to the warriors in the tribe who know about your origins. That spaceship of yours will be said to have been found by me in some ruins, not something you brought here.
"This time, I'll be the one to petition the Emperor for custody over you. You absolutely must not say a word, understand?"
From that vision, he'd seen many things. He had to protect his little wolf cub at all costs!
This was a matter that he had to negotiate with the Emperor himself. Axis must not speak up.
Axis nodded in response, agreeing to obey Russ's instructions.
As they spoke, over a dozen massive Imperial landing craft had already descended near the tribe.
These enormous steel constructs immediately drew a crowd of curious onlookers; none of the tribe's people had ever seen anything like them before.
When the bay doors opened, out marched a large group of Space Marines, each over 2.2 meters tall, clad in heavy power armor, the Imperial double-headed eagle emblazoned on their chests.
A squad of Space Marines approached Russ and dropped to one knee.
"Salutations, great Father. I am one your sons, from the Sixth Legion!" the kneeling Space Marine said with nigh a touch of excitement.
The return of their Gene-Father was a great celebration for the entire Legion. With his return, they now had a true Primarch to lead them!
Even just sitting there, the presence of their Lord boosted the fighting spirit of the whole Legion!
"To suddenly have so many children is a surprise," Russ said to his unfamiliar 'sons', "but since I'm back, I'll lead you well, from now on, for all mankind."
Gaining a whole troop of such giant sons all at once gave him a rather strange feeling.
Meanwhile, Axis pressed the scouter on his eye, and a series of beeps sounded!
He was curious about the power level of these Space Marines.
A reading popped up: 65. That was more than ten times the strength of a regular human male, who typically rated about 5.
Axis checked a few more of the Sixth Legion's Space Marines, and found the highest power level was around 93, with most falling in the 65–80 range.
A baseline Space Marine without power armor could punch with a force a little over a ton, so these power levels made sense.
Although their highest readings were just under 100, their overall combat strength wasn't just about raw numbers.
With nineteen superhuman organs, they gained all-around enhancements.
Astartes had astonishing reflexes. Most could react within fractions of a second, some even in nanoseconds.
With two hearts, a second set of lungs, and the ability to enter suspended animation, their survivability far exceeded others at their level.
And with their heavy power armor, monomolecular knives, chainswords, power swords, bolt guns, melta weapons, and plasma weaponry…
These guys' overall combat abilities probably matched a Dragon Ball character with a power level around 200—of course, that's without using ki!
Axis's scouter tests also caught the attention of a few Space Marines from the Sixth Legion.
'What was that beeping device?'
"So, little wolf cub—how do you rate my children's power?" Russ asked, his curiosity piqued.
"Their power levels are all above sixty but under a hundred, that's just the raw physical stats," Axis replied.