"Upgrading the base crystal...that's also an option. In critical moments, if we can't hold it, it can increase our margin for error."

Su Bai suddenly realized.

Any choice he makes is never made on a whim.

Instead, it involves a comprehensive comparison.

Choose the option that offers the greatest improvement and the best value for money right now.

This wave of upgrades, whether from runes or cards, offers limited benefits to him; upgrading his base is the best option.

Having made his decision, Su Bai no longer hesitated.

Immediately.

Upgrade the base crystal to level three in a row.

Whoosh!

Bathed in light, the entire chessboard continued to extend outward, expanding from its original diameter of 100 meters to 115 meters.

But don't be fooled by the fact that it only expanded by a mere fifteen meters.

The added path, however, means that monsters at all four intersections will have to take an extra turn.

This inadvertently creates more space for the defensive towers to deal damage.

The base crystal's health has also increased to 80 points.

Including the 20-point shield from the energy crystal.

That's 100 points of health.

It's much better than before when it would break at the slightest touch.

As for the extended monster attack time, it's not very effective for his current strategy. Perhaps it would be somewhat helpful if he could take down the Frost Dragon Tower a little later...

"Awooo!!"

The deep roar of the dragon was like rolling thunder, deafening and echoing through the sky.

Two minutes before the seventh wave arrived.

finally.

The Frost Dragon Tower has evolved into its complete form.

Its body shape has not changed much, only the color of its scales has become deeper, like dark blue crystals, and the spikes growing on its body are covered by a thick layer of crystal shell, making it less sharp and more majestic and composed.

【Frost Dragon (Mature Form)】

【sacred】

[Level: Rare]

[Level: 10]

Attack: 900

Attack Speed: 0.5

[Range: 100]

Energy: max

【Feature 1: Each attack of this turret grants a 5% attack speed boost for 5 seconds, stacking up to 5 times. Once all five stacks are active, the turret's attack type changes to area-of-effect damage and inflicts a 30% frost slow effect.】

【Feature 2: After this defensive tower is destroyed, there is a 25% chance that it will awaken the Dragon Soul Talent. After mastering the Dragon Soul Talent, it can break through to the ultimate form】

[Imprint: Attack Speed ​​Gauntlets]

...

The Frost Dragon Tower has undergone a tremendous upgrade after its final evolution.

The already insane attack speed is doubled again.

Combined with passive and attack speed gauntlets.

It can reach 0.25 seconds.

Four shots per second!

It's already very close to the maximum attack speed limit of 0.2 for a defensive tower.

This is a qualitative leap in its damage frequency.

Su Bai also noticed.

The fully evolved Frost Dragon actually has the potential to evolve to an even higher level!

Its current output is already ridiculously high.

If it evolves again, how exaggerated will it become?

"However... with a 25% chance, I'd better not even think about it, given how unlucky I am." He quickly shook his head, dismissing the dangerous idea.

The seventh wave.

As expected, this wave was just a normal one.

However, the difficulty has increased significantly. Monsters have started spawning from all four spawn points, a mix of ground and flying units, numbering nearly five hundred, which has put a lot of pressure on Su Bai.

The evolved Frost Dragon Tower turned the tide in this wave.

Once its passive effect is fully stacked, the area damage it deals can cover three tiles in front and behind it. Combined with its extremely high base stats, it can take down monsters within three tiles in almost a second.

That single tower protected two roads.

Finally, the statistical data provided by the system, and its output percentage, are sufficient to explain everything.

Damage Statistics

Frost Dragon: 47.64%

Solar flare: 22.57%

[Holy Arrow: 16.46%]

【other...】

In the seventh wave, the Frost Dragon Tower accounted for nearly 50% of the damage output.

However, Su Bai also felt that defense was becoming increasingly difficult. The strength of the seventh and sixth waves of monsters was completely different from what he had experienced in the regular mode.

Monster attributes almost doubled.

He couldn't fathom just how strong the eighth wave of monsters would be.

"The seventh wave's score is good enough to take first place..."

Su Bai opened the leaderboard.

Among them, the first place still belongs to Emperor's fourth wave.

He ranked higher than other players with the same score, probably because his overall defense rating was higher, such as eliminating monsters faster and having more base health remaining.

So far, no player has survived the fifth wave.

Tonight, this week's results will be updated.

The rankings on the leaderboard are unlikely to change much.

Thinking about this...

The pressure he felt facing the upcoming eighth wave of monsters eased considerably.

Let's look at the store first.

The items refreshed this time are all pretty good.

[Divine Descent: Adds an imprint effect to defensive towers, increasing their size by 1.5 times, attack range by 2, damage by 1.5 times, and attack speed by 15%]

【Soul Stealer: Adds an imprint effect to defensive towers, allowing their normal attacks to trigger critical hits, increasing critical hit rate by 15%】

[Goblin Gold Mine: Adds an imprint effect to the base crystal, producing 1 energy crystal every 30 seconds. Energy crystals can be consumed as a spellcasting resource and have a very low chance of producing Radiant Dust, which can enhance the attributes of defensive towers.]

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