Countdown, 25 seconds!

The Thunder Dragon took all the photos from all angles of the military restricted area, including the fixed patrol routes of the two patrols, and transmitted them to Li Yao's mind for modeling.

Li Yao's main question was, what if the patrol team changed the patrol route in the middle of the way?

Jin Xinyue said that in the standard vigilance code of the Ten Thousand Demon Alliance, each patrol team would set up three or four different patrol routes, which would change every half an hour or an hour.

If Li Yao and the Fire Ant King had more time to observe, they could see the law of changing the patrol route.

But they only have a few minutes to prepare, so they can only try their luck.

Once the other party really changed course, Li Yao had to be prepared.

Based on the terrain in the military restricted area, he calculated in advance twenty-three changes that the patrol could make, and determined that he had only seven seconds at the shortest.

Countdown, 15 seconds!

The Fire Ant King took out a very delicate cylinder engraved with demon patterns from his arms, unscrewed it gently, and two pitch-black beetles with a cyan vertical stripe growing on their backs flew out of the cylinder.

Under the control of the fire ant king, the two beetles flew higher and higher, over the high wall outside the military restricted area, and flew to the entrance of the No. 2 ventilation duct in advance.

Countdown, 5 seconds!

Li Yao took off his costume disguised as a secret treasure merchant and put on a new set of leather film battle suits.

This suit is really as thin as a cicada's wings, like a second layer of skin clinging to the body, there is almost no gap, and the direction of each muscle is highlighted.

"Huh!"

Li Yao lightly touched a rune on the waist of the battle suit, and ripples appeared on the surface of the light gray battle suit, gradually becoming translucent, and finally seemed to melt into the air, making him completely invisible!

This is an expert in the Chaos Blade organization, and the cell invisibility cloak is concocted by extracting a variety of demon beast cells with color-changing, mimicking, and transparent magical powers, such as chameleons, silver fish, and green leaf bamboo insects.

When stationary, it is extremely difficult to detect. It's like ice cubes thrown into water.

The only drawback is that the components that make up the cell-stealth suit are all highly active and need to be stored in a special culture medium. Once taken out and exposed to air, it will not last more than five minutes.

Basically, after four and a half minutes, the cloak gradually wears off.

On the other hand. The invisibility cloak works best when it is stationary, and when moving at high speeds, it still leaves a trail of afterimages that make the air appear strangely distorted.

Countdown, 0 seconds!

Li Yao floated out like a wisp of smoke.

"Huh!"

He keenly sensed the thermal ray network on the high wall of the military restricted area, but it contracted the bones and muscles of his body to the limit, not much bigger than a cat, and drilled into the gap in the thermal energy net!

The two patrols were moving in the opposite direction of the No. 2 ventilation pipe, and Li Yao calculated the time for them to turn back. While observing the scanning angles of several biochemical monitoring eyes at a high place, he moved around in the large blind spot of the needle tip, and quickly approached the target.

That's when --

One of the patrols, before reaching the end of the military restricted zone, turned back ahead of schedule and changed a new patrol route!

"Damn it!"

Sure enough, it's the second patrol plan!

Li Yao stopped his movements in an instant, his heartbeat and breathing were suppressed to the limit, and even his pores were completely locked, not releasing the slightest heat and breath, and he watched this patrol team rushing towards him.

As long as absolute stillness is guaranteed. The invisibility cloak will work, and the invisibility time is five minutes, which is enough!

The patrol and Li Yao passed by, and the nearest soldier only had to stretch. can touch Li Yao's head.

Thankfully, they didn't notice the faint distortion of the air in the immediate vicinity.

Even half a minute after they walked over, Li Yao remained motionless, relying on the Thunder Dragon, observing their new patrol line.

After switching to the second set of patrol lines. The blind spot between the two patrols was very different from what it had just been, and everything had to be recalculated.

After silently calculating for one minute and two seconds, Li Yao started again!

In the depths of his brain, the biochemical surveillance eyes on the top of his head, the two patrols combined twenty or thirty eyes, seemed to radiate red rays like substance, forming a criss-crossing dead line in front of him.

The line of death kept changing, and he danced with it, fast and slow, advancing and retreating, and it took more than three minutes to move with difficulty to the entrance of the No. 2 ventilation pipe.

At this moment, there is only one minute left before the invisibility cloak fails.

In order to deliver air to the massive underground body of the Blood Demon Eye, each ventilation duct was about a foot in diameter, and an adult of medium size could barely squeeze into it.

However, the entrance to the ventilation pipe is covered with a very fine barbed wire, and there is an anti-cut warning array around it.

Li Yao quickly glanced at it and figured out the operating principle of the alert talisman array, which should be to sound the alarm by sensing the vibration.

Once an external force forcibly breaks through the barbed wire, there will be an abnormal vibration, and as long as it is perceived, an alarm will be sounded.

"Boom!"

Inside the barbed wire, half a meter deep into the pipe, three huge fan blades rotated rapidly at a speed of 1,500 revolutions per minute, and the fan blades were also engraved with an offensive wind rune array, rolling up a wind blade with an unstoppable handle, turning this section of the pipe into an invisible meat grinder.

There are 45 seconds left before the invisibility cloak completely fails.

"Zizi, zizi!"

Li Yao sensed that the invisibility cloak gradually had a stiff and sluggish feeling.

This is a sign that invisible cells are about to wither.

At this moment, both patrols had gone to the farthest point from him, and all the biochemical surveillance eyes happened to be scanning other areas.

However, after this route adjustment, the time left for Li Yao is only 11 seconds!

"Enough!"

Li Yao's hands instantly turned into two gray mist, and first gently adsorbed the four magnet-like magic weapons next to the warning talisman array, and the four magic weapons formed a temporary loop, which was equivalent to temporarily introducing the alert talisman array into a "fork in the road", making it ignore the subtle vibrations on the barbed wire.

Immediately afterwards, Li Yao used an extremely sharp bone blade to carefully scrape off a large amount of rust from the barbed wire, and put away all the rust.

After doing all this, it took Li Yao three seconds.

Next, he drew a circle on the barbed wire, cut it silently, and drilled into it!

It's not difficult to break through the barbed wire, it's hard to get it back to its original state!

The patrol at the farthest point of the military restricted area began to turn, and the two biochemical surveillance eyes gradually turned their perspective back, and were about to lock on to the entrance of the No. 2 ventilation duct.

Li Yao's ten fingers are like ten small snakes without bones, and between the two fingers, there is a thin needle like a cow's hair.

These thin needles, however, are hollow, and there is a small liquid sac behind them, which stores a trace amount of natural viscose, which was originally used to fix the components of the ultra-miniature magic weapon.

Li Yao manipulated the tiny muscle bundles on his fingers, squeezed out the glue with a fine needle, and reglued the short mouth of the barbed wire together, he deliberately spilled some glue on the edge of the glue, and blew up the rust that had just been scraped off.

Finally, he took out a can of spray and sprayed it lightly at the barbed wire.

Suddenly, a layer of fine dust appeared on the surface of the "rusty" barbed wire, and there were even strands of broken wires that looked like spider webs.

At first glance, it is seamless, and there is no trace of being forcibly broken.

Only then did Li Yao use his spiritual energy to hook four "magnets" through the holes in the barbed wire, so that the warning talisman array returned to its normal circuit.

"Huh!"

The biochemical monitoring eye swept through the entrance of the No. 2 ventilation duct and did not find anything unusual.

But the invisibility cloak on Li Yao's body also reached its limit, and distorted spots of light began to appear.

Once the patrol approached, they were sure to spot a vague gray shadow behind the barbed wire.

The two black beetles of the Fire Ant King followed Li Yao in and slammed into the high-speed rotating fan!

This fan has a fast speed and strong suction, and often inhales some small flying insects.

These two black beetles, but they were the "green oil fireflies" carefully prepared by the fire ant king, and they hit the fan blades hard, and immediately made two "**" sounds, bursting out two small fireballs!

These two fireballs interfered with the wind system array on the fan blades, and the fan's self-protection mechanism activated, and there was a brief decrease in rotation, and began to eliminate small foreign objects.

Li Yao took this opportunity to widen his eyes, his pupils constantly fluttering, and he could see every detail of the fan's rotation clearly, and he also felt those wind blades that could not be seen by the naked eye.

"Huh!"

He managed to get through the gap in the blades at 780 revolutions per minute!

Three wind blades slashed at him, but he locked all the muscles around him, leaving no blood behind.

Half a second later, the fan speed returned to 1500 rpm, and the patrol was just in time to the entrance of the second equivalent pipe

They were attracted by the sound of the green oil fireflies crackling, and looked into the barbed wire with some suspicion.

The fan was running very steadily, and they didn't see anything but the rapidly swirling blades.

There was a faint smell of burning in the air, but they knew that it was just a few more bugs that had been sucked in by the fan.

The rust, dust, and even spider silk on the barbed wire dispelled their insignificant suspicions, and the patrol returned to their normal patrol route, leaving the little thing behind them completely.

Behind the fan, Li Yao wiped the cold sweat from his forehead and grinned.

The penetration from the 4th to the 3rd alert zone is already half successful!

In front of him was a swarthy ventilation duct that went underground, filled with all sorts of deadly poisonous insects, acting as a warning system. (To be continued.) )