The team of fallen elves is still advancing slowly. The probability of being blinded and walking backwards is only half and half. There are more fallen elves behind who are not affected by the disease, and the team is always moving forward slowly.

This speed is enough for the Dark Thunder Mage to develop.

In the normal stage, it requires a fixed 100 experience points for each level up, and with the efficiency of triggering a chain lightning every 7 attacks, it only takes half a minute at most to level up.

Upgrading is not difficult.

The difficult thing is how to control the monster's attack rhythm.

It is necessary not only to allow the low-level Dark Thunder Mage to gain experience as much as possible under limited conditions, but also to ensure that no monsters are missed.

To do this,

The blindness epidemic can be said to have played a key role.

Cheng Shen's luck reversed in the third wave, or in other words, he became more and more able to understand the hints given by the system after several "intimate" tortures.

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

The damage is very high.

It can also increase the damage taken by monsters.

Very cost-effective.

But he still chose the blindness epidemic without hesitation.

In his opinion, the system's sudden provision of an auxiliary defense tower with a control effect is definitely not unreasonable.

Furthermore, he also learned from other people’s experiences…

When all the fallen elves passed through the poisonous fog area.

Two minutes have passed.

Counting the kill experience,

The Dark Thunder Mage has now successfully risen to level seven.

The influence of the blindness epidemic is declining, and the efficiency of infection among fallen elves is much slower. More fallen elves who have lost their sight are returning to normal, and Cheng Shen does not dare to delay it any longer.

Immediately, cooperate with the dark thunder mage to output with all your strength.

Defeat this wave of monsters.

【Defense successful!】

[Currently accumulated rewards: 40 gold coins!]

[Obtain: Elite Treasure Box!]

【Do you want to continue the challenge? 】

…

Whoosh!

The upgraded golden light once again surrounded the defense towers on the field.

Cheng Shen looked in front of him.

A palm-sized green treasure box is suspended in the air.

Select Enable.

[Obtain: Void Slate 20 (can only be used here)! 】

[Obtain: Crystal Energy Amulet (can only be used here)! 】

[Obtain: Rhythm Note (only available here)! 】

…

Two very special items were found in the treasure chest.

【Crystal Energy Amulet】

【Rune】

[Level: Normal]

[Effect: Using the crystal can increase the shield value by 20 points, and increase the energy recovery speed of all units in the field by 1 point for each wave of monsters.]

…

【Rhythm note】

【Rune】

[Level: Normal]

[Effect: When used on a defense tower, it can trigger an acceleration effect when attacking, increasing the attack speed of itself and friendly units by 1%, lasting for 3 seconds, and can be stacked up to 15 times]

…

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

Each defense tower can exert the effect of up to three runes.

Just like equipment.

However, after a rune is used, it will permanently occupy a slot and cannot be replaced.

The crystal energy talisman is definitely for crystals.

However, its additional effects are somewhat tasteless.

Restore energy.

This is very useful for sacred defense towers, and Cheng Shen's only sacred defense tower, the Giant Tower, does not need to consume energy.

You don’t have to rush to use it.

The rhythm notes are undoubtedly needed to equip the Juli Tower.

Other defense towers must have a target to attack. Once there is no target, the bonus status will be cut off.

restart,

It would take fifteen seconds at the fastest.

It is the only one that can guarantee to always trigger the full layer of acceleration effect.

Twenty slabs of void stone.

Let Cheng Shen unlock the authority to modify the void path in this place.

He changed the road leading out of the monster entrance from a straight line to a curved road, surrounding the blinding plague, and increased the coverage area of ​​the plague's poisonous fog. Originally, the monster only had to walk 15 meters to leave the poisonous fog area, but now it has to walk 25 meters.

"It's a pity that the monster spawning point cannot be moved forward, otherwise the road would have to be designed into a zigzag maze..."

Cheng Shen thought to himself.

Keep challenging.

Five cards depicting defense towers appeared in front of him.

Cheng Shen quickly selected two of them.

【Thunder Magnetic Laser Tower】

【mechanical】

[Level: Rare]

【Level:1】

[Attack:70]

[Attack speed: 1.5]

[Range: 90]

[Characteristics: Launch a laser with a penetrating effect, causing damage to up to five units in a straight line, and adding a paralysis effect of 1.5 seconds. The damage of the laser decreases by 15% for each target it penetrates]

…

【Air catching net】

【Base】

[Level: Rare]

【Level:1】

[Attack: 50]

[Attack speed: 1]

[Range: 70]

[Characteristics: Launch a capture net with a confinement effect, which can restrict air units and cause them to lose their ability to fly]

…
To be continued...