Just as everyone was shocked by Su Nan’s thunderous methods, the person himself was still somewhat dissatisfied.

    “If my spiritual power were stronger, that acid spray just now would have killed the Iron Devourer.”

    Su Nan felt a bit regretful, pointing his finger, launching another acid spray, like an arrow towards an Iron Devourer.

    Zzz!
    Even though the Iron Devourer swiftly dodged, its side was still hit, and in an instant, most of its waist and abdomen were corroded, inevitably affecting its movement.

    Taking this opportunity, Brother Ke Yi dashed forward, slicing the Iron Devourer into two.

    The brothers worked in perfect harmony, eliminating four Iron Devourers in a short time.

    Seeing this, everyone’s morale soared.

    And it seemed that the Iron Devourers realized something was amiss and began to gradually retreat.

    Noticing this, Brother Ke Yi quickly shouted, “Don’t let them escape, block them!”

    The knights rushed towards the Iron Devourers.

    Su Nan squinted his eyes, casting a Sleep Curse on one of the Iron Devourers at the back.

    To his surprise, that Iron Devourer was completely unaffected.

    “The spell didn’t work?”

    Su Nan was taken aback.

    At this moment, an Iron Devourer suddenly leaped up, disappearing into the rock wall as if diving into water, the entire process silky smooth, leaving everyone unable to react in time.

    The other Iron Devourers followed suit, disappearing into the rock wall.

    Seeing the last Iron Devourer also leap towards the rock wall, the dazed Su Nan finally reacted, a ghostly light flashing in his eyes.

    In an instant, the graceful posture of the Iron Devourer came to an abrupt halt, suspended mid-air as if tightly grasped by an invisible giant hand, unable to touch the ground or walls.

    No matter how it struggled, it couldn’t break free from the invisible restraint.

    “Finish it!” Su Nan said in a deep voice.

    The dumbfounded onlookers, finally awakened from their daze, took action.

    Crack!

    The Iron Devourer in mid-air was instantly shattered to pieces.

    “Su Nan, that just now…”

    Brother Ke Yi looked at Su Nan, his expression full of amazement.

    If the secondary dragon blood potion was still within his range of understanding, the miraculous techniques Su Nan just displayed were far beyond his comprehension.

    Su Nan knew what he wanted to ask, calmly explaining, “This is magic.”

    Magic!

    Everyone present silently pondered this word, feeling as if a whole new world was slowly unfolding before their eyes.

    Ignoring the others, Su Nan quickly approached an Iron Devourer that had been sliced in two, crouching down to inspect it.

    Moments later, he showed a peculiar expression.

    “Is something wrong?”

    Seeing Su Nan’s expression, Brother Ke Yi hurriedly asked.

    Su Nan shook his head, stood up, and said, “I think I know how these Iron Devourers came to be.”

    When the Sleep Curse failed to take effect earlier, he already felt something was wrong.

    Situations where a creature is immune to spells usually involve two possibilities.

    One is having sufficient spell resistance, like the dragon race.

    Dragons are famously known for their innate high spell resistance, with adult dragons immune to all spells below the third circle.

    The other is that the creature’s life form is naturally immune to certain spells.

    Take the Sleep Curse for instance, elemental creatures, undead beings, and puppet creations can all be immune to the Sleep Curse.

    And it was evident that the Iron Devourer was the latter.

    “I originally thought it was a metallic life form, but it turned out to be a puppet creation.”

    During the inspection, Su Nan found enchanted runes within the Iron Devourer’s body fragments.

    Naturally born life forms could not possibly have enchanted runes inside them.
    The only explanation is that the Iron Devourer Beasts were artificially created!

    And those capable of creating puppets are only wizards (apprentices)!

    “There is most likely a wizard’s legacy left in the depths of this mine!”

    Su Nan’s heart surged with ecstasy.

    He originally planned to search for a wizard’s legacy outside after advancing to a second-level wizard apprentice, yet, unexpectedly, there was one near Blackstone City.

    This was undoubtedly a huge surprise!

    Under Su Nan’s explanation, Brother Ke Yi and the others all showed extremely shocked expressions.

    No one expected that these beasts, whose combat power could rival that of knights and possessed the strange ability to burrow into rock walls, were actually puppets created by wizards!

    Mysterious potions, terrifying spells, powerful puppet creations—these unimaginable things all came from the hands of wizards!

    What kind of group is this?

    The deeper they understood, the more they felt the mystery and power of wizards.

    Legend has it that thousands of years ago, wizards once ruled the entire continent, creating an unprecedented era of prosperity.

    Before, they treated this as an ethereal legend, but now it seems highly likely that it truly happened!

    Everyone had different thoughts, and for a moment, the tunnel fell into silence.

    Su Nan paid no mind, said something to Brother Ke Yi, and sat on the ground to meditate and restore his mental power.

    The recent battle had used many spells, almost consuming all his mental power.

    Considering the fierce battles ahead, it was best to continue exploring after restoring his mental power to be more cautious.

    About two hours later, Su Nan ended his meditation.

    The team continued on.

    Fear comes from the unknown.

    After learning the origin of the Iron Devourer Beasts, everyone’s fear of these monsters was greatly reduced.

    Especially after just taking down five Iron Devourer Beasts, raising the team’s morale to its peak.

    However, confusingly, on the road ahead, the Iron Devourer Beasts seemed to have vanished, not appearing from beginning to end.

    “Where did those monsters go?” Jodun complained, smacking his lips.

    Brother Ke Yi also furrowed his brows.

    If the remaining Iron Devourer Beasts just hid like that, they really wouldn’t be able to do anything about them.

    Finding a group of wall-drilling Iron Devourer Beasts in the dimly lit, labyrinthine underground tunnels was no different than finding a needle in a haystack.

    Su Nan was lost in thought.

    High-level puppets have self-awareness and artificial intelligence akin to humans, but the Iron Devourer Beasts clearly weren’t in this category.

    They looked like low-level puppets, usually operating following some specific program.

    For instance, when encountering enemies they can’t handle, they prioritize ensuring their own safety.

    This also explained why no former lord could exterminate the Iron Devourer Beasts.

    Faced with a group of ‘bully the weak, fear the strong,’ and hide-and-seek masters, even the Great Knights were at a loss.

    But what the former lords couldn’t solve doesn’t mean Su Nan had no way.

    He closed his eyes, concentrating on sensing the energy particles in the air.

    If nothing unexpected happens, these Iron Devourer Beasts should be guards of the unknown wizard’s legacy deep in the mining area.

    As long as he finds the place where the wizard’s legacy is located, the Iron Devourer Beasts will definitely appear to block them, then they can annihilate the opponent.

    And where the wizard’s legacy is located, the concentration of energy particles is certainly far higher than other places.

    As long as they head towards the place with high energy particle concentration, they will likely find the target location.

    Not long after, Su Nan opened his eyes, pointed to the tunnel opening on the right, and said: “Go that way.”

    Brother Ke Yi was only stunned for a moment before immediately reacting, leading the way to the right without hesitation.

    Everyone snapped out of it and quickly followed.

    Along the way, the team moved intermittently.

    Whenever they encountered a fork, Su Nan stopped to sense for a while, then decided on the direction of travel.

    Like this, not knowing how long they had walked, suddenly everyone stopped.

    This time, it wasn’t because they encountered any monster, nor did they find a fork, but the road had ended.

    To be precise, a massive dark door had appeared in the middle of the tunnel.

    The tightly closed door had sealed off the entire tunnel.