This Beast-Tamer is a Little Strange

Due to his background in microbiology research in his past life, Kain didn’t throw the word “immunity” around lightly.

So when Bea used it—when she said the ancient contract was developing an immunity—he froze.

Not because the word was unfamiliar.

But because he understood exactly what it implied.

In this world, the average spiritual creature and person’s body wasn’t built with disease in mind. Spiritual strength, fortified bones, enhanced recovery rates—sure. But immune systems? Bacterial defence? The concept of microbial warfare had almost gone extinct. Why? Because illnesses had. Or at least, the ones that used to cull millions of lives back on Earth.

The people here weren’t immune because they didn’t need to be. Their bodies were naturally hardy enough that any bacteria or virus couldn’t affect them unless it was powerful enough itself. And based on some hints Kain had picked up over time, it would appear as though most of the dangerous microbes had all been collected and either stored or exterminated for some reason…

Nevertheless, due to the lack of any pathogens, Bea had never come across an immune response when invading a host. Her biggest roadblock had always been mental defences built by spiritual power. Which made the concept of an entity developing an active resistance to Bea’s splits not just rare—it was borderline unprecedented.

It was even more unusual because Bea didn’t attack the body.

She didn’t infect bloodstreams or lungs. She didn’t act like the average bacteria or virus.

She invaded thought.

She seeped between the folds of memory, corrupted emotional reactions, twisted mental processes, and disguised herself as ambient background noise. Most defences against her were like putting on a jacket to avoid a gas leak. You needed airtight, layered psychic training or mental shields born from powerful spirit skills.

But this creature—creature-this ancient lattice-bodied monster—wasn’t building a barrier.

It was adapting to her presence.

Learning her signature, actively finding her splits, and then engulfing and destroying them like immune cells would. Moreover, when it actively destroyed her splits, it did something to them that reduced the Empty Throne Effect.

Dozens of splits had likely already died in the creature, and Bea could sense that hundreds, if not thousands, more would need to die before she could even remotely come close to opening a channel.

“It’s not only my splits, it’s even isolating my neural seepage articles,” Bea whispered in Kain’s mind, sounding more intrigued than offended. “Catching them before they root. Like it’s tagging any influence I may have and developing antibodies.”

“So you’re saying that it appears to have an advanced immune system more similar to the one I described to you before?” Kain muttered.

“Exactly. I thought it was useless at the time. Teaching me all that ‘immunology’ nonsense.”

Kain didn’t respond.

Because the creature moved again.

This time, faster. It didn’t attack randomly. It moved in direct counter to Bea’s position—despite her being invisible to most senses.

It sent an invisible wave of energy in Kain’s direction, and Kain used his spiritual power, and Aegis formed a wall from afar to block the attack. But the energy seamlessly penetrated both barriers, and Kain closed his eyes in preparation for impact, but the energy surprisingly precisely hit Bea, almost as if it could sense her true body..

Bea hissed in pain. And even Kain’s heart skipped a beat. Bea had never had to deal with a direct attack since she was born. No creature had ever detected her well enough to target her precisely. Naturally, Kain had no idea about the quality of her physical defences. For all he knew, a physical hit from a white-grade spiritual creature might knock her out.

Fortunately, Bea’s defence wasn’t that weak, she quickly divided into 2 before the beam hit, and one half did immediately collapsed under the impact, but used up most of the attack’s energy. The remaining energy (similar in strength to an attack from a yellow-grade spiritual creature) only injured the remaining half.

However, considering she was blue-grade, Kain could conclude that Bea’s defence was by far her weakest feature…a yellow-grade attack really shouldn’t be able to injure the average blue-grade spiritual creature like that…

‘I definitely overlooked that weakness…’ Kain vowed to find a way to strengthen her physically once this match was over.

The damage to Bea, considering one half of her true body was eradicated, and the remaining half was quite injured, was substantial. Her Pale Thought Field was retracted, the edges dulling.

“Reinforce Vauleth and the Vespids,” Kain ordered to Chewy. And at the same time, Kain launched his spiritual skill to give Aegis an all-around boost.

Chewy pulsed obediently, transferring a burst of pure energy directly to the red dragon, who had just barely held his own against the Mirrorhorn Elk’s relentless charges.

The ancient creature darted in for another strike. This time, Aegis met it head-on. With his limbs reinforced, he managed to intercept the creature in the middle of its charge.

Their blows collided.

Space cracked.

For the first time, the creature was pushed back forcefully.

It spun once in the air, lattice limbs flickering, then stabilized. Kain swore he saw the creature’s form quiver—not from damage, but from confusion, like it hadn’t expected resistance.

“Keep the pressure up!” Kain barked.

Aegis charged, no longer simply defending but advancing. With every blow, more of Bea’s influence laced into the space around the creature—microdoses this time, too small to trigger the defensive response immediately. She was learning, too. Switching from broad-scale contamination to localized injections. Not to mention, after her injury, it was actually easier for her to do this.

Meanwhile, on the other side of the arena, the Vespids and Queen were still in a heated fight with the fused beast. The peak blue-grade fusion had taken down another two Vespids, but the swarm had returned the favour by shredding the creature’s shoulder-joint plating.

Queen, floating slightly above, unleashed another radiant pulse. Life energy burst through the field like sunlight at dawn, invigorating the wounded. Then she launched one of her oldest skills:

Royal Edict, which grants a 50% stat increase to all of her offspring.

The guards all began to emit a subtle glow, and their speed and power of their strikes noticeably increased.

A fresh barrage of stingers descended, cracking the opponent’s chitin even more.

The creature roared in protest, but didn’t fall. If anything, it became more aggressive.

Vauleth, clashing with the Mirrorhorn Elk, finally got in a solid hit—his deceptively sharp wing slicing just under the Elk’s flank. Sparks flew.

“Just a scratch,” the dragon muttered indignantly. “But I’ll take it.”

Back at the center of the battlefield, the ancient contract hissed. Its body flexed, and then—

It split.

And one half launched itself towards Kain.

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