The team of fallen elves is still moving slowly, the probability of being blinded and walking backwards is half and half after all, and there are more fallen elves in the rear who are not affected by the disease advancing, and the team is always moving forward slowly.

That's enough speed for the Dark Thunder Mage to develop.

In the normal phase, it requires a fixed 100 experience points per level, and with its efficiency of triggering a chain of lightning every 7 attacks or so, it only takes half a minute at most to increase the level.

It's not hard to upgrade.

The difficulty is how to control the rhythm of the monster's attack.

It is necessary to let low-level Dark Thunder Mages brush up as much experience as possible under limited conditions, and also ensure that no monsters are missed.

To do this,

Blindness can be said to have played a key role.

Cheng Shen's luck reversed in the third wave, or rather, he was more and more able to pay attention to the hints it gave after several "intimate" tortures by the system.

There is also a Divine Light Tower in the third wave of choices.

The damage is high.

It also increases the damage taken by monsters.

Excellent value for money.

But he still did not hesitate to choose the blindness epidemic.

In his opinion, it would not be unintentional for the system to suddenly give a control effect to a secondary tower.

Moreover, he also learned from the experiences of others...

When all the Fallen Elves pass through the Poison Mist Zone.

Two minutes have passed.

Counting the kill experience,

The Dark Thunder Mage had successfully risen to level seven at this moment.

The influence of the blindness epidemic is declining, and the efficiency of infection between disease-causing fallen elves is suddenly much slower, and more fallen elves who have lost their vision are returning to normal, and Cheng Shen does not dare to drag it out any longer.

Immediately, cooperate with the Dark Thunder Mage to output with all his might.

Solve this wave of monsters.

[Successfully defended!] 】

[Reward has been accumulated so far: 40 gold coins!] 】

[Obtain: Elite Chest!] 】

[Do you want to continue the challenge?] 】

……

Swish!

The upgraded golden light once again surrounds the towers in the field.

Cheng Shen looked in front of him.

A palm-sized green treasure chest hovers in the air.

Select On.

[Obtain: Void Slate +20 (here only)!] 】

[Obtained: Crystal Energy Charm (here only)!] 】

[Obtain: Rhythm Notes (here only)!] 】

……

Two very special items were found in the chest.

【Crystal Energy Talisman】

Runes

[Level: Normal]

[Effect: When used on crystals, it can increase the shield value by 20 points, and increase the energy recovery speed of all units by 1 point for each wave of monsters]

……

【Rhythm Notes】

Runes

[Level: Normal]

[Effect: When used on towers, it triggers an acceleration effect when attacking, increasing attack speed by 1% for self and allied units for 3 seconds, stacking up to 15 stacks]

……

Cheng Shen quickly figured out that this was a special item unique to the Void Challenge.

Each tower can be effected by up to three runes.

It's like gear.

However, runes will permanently occupy a slot after being used and cannot be replaced.

The Crystal Energy Charm is definitely for the Crystal.

However, its additional effects are a bit frivolous.

Restore energy.

This is very useful for the Divine Defense Tower, and Cheng Shen's only Divine Defense Tower, the Great Force Tower, does not need to consume energy.

You don't have to rush to use it.

And the rhythm notes are undoubtedly to be equipped with the Great Tower.

All other towers require a target to attack, and once there is no target, the bonus will be broken.

reboot

It takes fifteen seconds at the earliest.

It alone is guaranteed to trigger the full stack of acceleration all the time.

Twenty Void Slates.

Let Cheng Shen unlock the transformation authority of the Void Path in this place.

He changed the section of the road out of the monster mouth from a straight line to a detour, surrounding the blind plague, increasing the enveloping range of the plague mist, which used to be a monster that only needed to walk 15 meters to leave the mist, but now it has to walk 25 meters.

"It's a pity that the spawn point can't be moved forward, otherwise you have to design this road as a zigzag ......maze."

Cheng Shen said in his heart.

Keep up the challenge.

Five cards depicting towers appeared in front of him.

Cheng Shen quickly selected two of them.

【Laser Tower】

【Machinery】

[Level: Rare]

[Level: 1]

[Attack: 70]

[Attack Speed: 1.5]

[Range: 90]

[Characteristics: Fires a laser with a piercing effect, dealing damage to up to five units in a straight line, and attaching a paralyzing effect for 1.5 seconds, decreasing the damage of each piercing laser by 15%]

……

【Empty Trap Net】

【Basic】

[Level: Rare]

[Level: 1]

[Attack: 50]

[Attack Speed: 1]

[Range: 70]

[Feature: Fires a trap net with a confinement effect, which restricts air units and incapacitates them from flying]

……

Thunder Laser Towers can increase the upgrade efficiency of Dark Lightning Mages.

It also provides additional control.

Very good.

And Cheng Shen took it down decisively after seeing the empty net.

The system suddenly gives the option of an anti-aircraft tower, the purpose of which is self-evident, there will definitely be flying units among the monsters attacking in the next wave.

This is already a blatant manifestation.

Long-range defense towers have air defense effects, but they lack the control of the most critical blindness epidemic, and it is undoubtedly impossible to rely on output alone to stabilize the fourth wave of monsters.

The system prompt sounds quickly.

[The fourth wave of Void Challenge monsters has struck!] 】

[This attacker: Ancient Crocodile/Yellow Wasp!] 】

[Quantity: 240!] 】

……

Buzzing......

Before the monster appeared, Cheng Shen had already heard a buzzing sound.

Poisonous bees the size of pigeons, covered in fluff and yellow and black, flew out of the whirlpool.

As soon as they appeared, they flew into the air more than ten meters above the ground.

The poisonous fog is not shrouded at all.

Followed by.

It is an ancient giant crocodile with a body length of five meters, they are covered in heavy scale armor, and their limbs are short and strong, although they move on the ground, they are not slow at all, and they can leap out three or four meters away in a second.

Woo!

The newly built netting immediately began to attack, projecting a ball of thread that spread out in mid-air and turned into a two-meter-wide net.

At once, four or five yellow wasps were enveloped.

The trapped wasp lost its ability to move and fell into the poisonous mist with a pop.

This situation caused an unexpected change in Cheng Shen.

Originally, even if the poisonous mist could cover a range of twenty-five meters, it would not be able to exert significant effects due to the size of the ancient giant crocodile.

Its base probability of pathogenicity is only 30%,

It's all about contagion between monsters.

And the ancient crocodile, a huge unit, is its nemesis.

It can fall into the poisonous mist with the yellow poison bees that are netted one by one.

The number of infections is stacked up.

The ancient crocodile that could have successfully walked out of the poisonous fog also began to be recruited.

However, the ancient crocodiles did not run around after being blinded, and the nature of the creatures should be that even if they were inhabited, they remained motionless.

At first glance,

I thought they had suddenly fallen asleep.