1800 per second, compared to 10 seconds 700 when fighting sand scorpions, the speed of experience gain is more than 20 times!

In other words, it takes more than a week to fight the sand scorpion before Chen Kai can be promoted from level eight to level nine, and in this fight against the white silk spider, it only takes three hours for Chen Kai to rise to level nine!

Of course, Silk Spider has a limited amount of mana, and it is impossible to supply White Silk Spider all the time.

So when the silk spider had dozens of mana left, Trixisi asked everyone to stop, let the white silk spider kill Xiao Hei first, and then the silk spider came up to nibble on the white silk and returned to the blue, and then summoned Xiao Hei to start the second round.

Although it takes more than a minute for the silk spider to eat the white silk, the calculated experience gain speed is about 900 points per second, and the effect is quite good.

And when five minutes later, a second silk spider joins the fray, and the rate at which experience is gained skyrockets again.

Three hours later, when the number of silkworms rose to 3, Chen Kai also rose to level ninth.

"This upgrade speed is invincible!"

Chen Kai sighed while adding the twenty attribute points obtained from the upgrade to the spiritual attribute, and then converted them into strength attributes.

"But if we do another silk spider, we'll only have to kill one."

Trixisi said helplessly: "It's very extreme for Xiao Hei to carry 3 silk spinning spiders, and if you have more, you can't do it."

Although the White Silk Spider does not have any physical attack power, they are very fast, even if they only survive for 2 seconds, they can attack 6 times, dealing 45 true damage for 2 seconds.

The attack speed of the Silk Spider is nine times a second, in other words, the White Silk Spider spit out by the Silk Spider in one second can bring 315 true damage to Xiao Hei.

When three silk spiders come together, it is 945 true damage per second, and 9450 damage per 10 seconds.

And Nami's protective water shield and healing water elf can only offset 4,000 points of damage in 10 seconds, so every 10 seconds, Blackie's HP will drop by 5,450 points, barely enough to last 30 seconds, allowing Trixi's summoning skill to cool down.

If there is another silk spider, Xiao Hei will not be able to carry it for more than 30 seconds, and the perfect balance will be broken.

"But it doesn't matter, when the time comes, we will kill a few spiders, you will be resurrected, a few more new forces will be exported, and the time for cleaning up the white silk spiders will be compressed to less than one second, and we will be able to carry a few more silk spiders."

If you can compress the time to kill the white silk spider to less than one second, the damage of the white silk spider will be reduced by 80%, and Xiao Hei alone can carry fifteen silk spiders, and the speed of experience increase ......

"Go back this time, you hurry up and learn me a skill that can summon corpses such as a burial place, really, your broken skill, you have to be a corpse to summon, it's useless at the critical moment!"

Chen Kai smiled awkwardly, he had this idea before, but this kind of skill is pitifully rare, the audience is too small, and the NPC store does not sell this skill at all.

Just when Chen Kai was depressed, the fourth spider came.

"There's a new spider coming!"

The first time he found the new spider elegy, he immediately greeted him, of course, in terms of vision, he couldn't compare with Traxisi of the archer profession and Chen Kai who had the eye of blue light, but who made him have nothing to do now, so Trixisi arranged to do the work of sentry.

"This is...... Crypt spider, good! Chen Kai, come, kill this directly and use it to summon. ”

"Good!"

Name: Crypt Spider

Race: Zerg

Rank: Boss Level

Level: 25

Strength: 625

Intelligence: 0

Constitution: 0

Spirit: 0

Dexterity: 0

Health: 30000/30000

Mana: 6250/6250

Physical Attack: 1250

Magic Attack: 0

Physical Defense: 0

Magical Defense: 0

Attack Speed: 1 time/sec

Movement speed: 10 m/s

The Crypt Spider is a level 25 boss monster characterized by being stealthy and good at killing with one hit.

Its first skill is called Revenge Raid, similar to Chen Kai's stealth, ten seconds after using the skill, it enters the stealth state, and adds 50% absolute movement speed, and the stealth breaking attack will cause 100% real damage of the physical attack bonus within the duration, the damage can enjoy the crit effect, the duration is 30 seconds, and the cooldown time is one minute.

Additionally, Vengeance Raids cannot be interrupted from invisibility.

The second skill is naturally a critical hit, which adds 10% critical hit chance and 250% critical hit effect.

The third skill is called Fatal Piercing, which grants a Critical Piercing status every minute and gives you an additional 100% critical hit chance when you attack in this state

The fourth skill is Mighty Swing, which adds an additional 30% to Attack Splash.

The fifth skill is a deadly strike like the Shadow Skeleton, which consumes 50% of its HP and deals 10 times the damage of the next attack.

The sixth skill is the Spike Shell, which is immune to and reflects all damage for 5 seconds, and fires a spike with toxin to stun the attacker for 2 seconds.

The seventh skill is the same Digging and Piercing skill as the Sand Scorpion, which can teleport 20 meters underground (now 44 meters with the bonus of cast range) and stun enemies in its path, while dealing 1000 true damage to them.

In the case of Revenge Raid + Fatal Piercing + Sacrifice Strike + Critical Strike, if the Crypt Assassin can perform a Hidden Strike, it will deal 43000+ True Damage, and at the same time, under the effect of Power Awakening + Giant Swing, it will deal 85% splash damage to enemies within a 5-meter radius behind the target.

With more than 40,000 true damage at a time, except for lords above level 22 or other units with a lot of physique that can have more blood than this damage, most NPCs may be directly killed by the crypt assassin.

However, as long as you know the existence of the other party in advance, there is no problem.

After seeing the figure of the crypt spider through the reconnaissance guards and sentry guards, Chen Kai made preparations in advance.

Although the crypt spider is threatening, its movement speed is relatively slow, and this movement speed is not seen at all in front of Chen Kai's increasingly mature prediction technique, the figure of the crypt spider has just appeared in the field of vision of the blue eye, and in the next second, it is trapped in the white bone cage.

Then the Crypt Spider was left with only two options, either to use an attack that would kill anyone in the Darkmoon Guard on the Bone Cage, or to resist their output until the Bone Cage was gone.

The crypt spider chose to resist hard, and then he found that he couldn't bear it - not to mention that the others were just Trixis, who was full of firepower, approaching five arrows in a second, and the second injury was as high as more than 5,000, and he couldn't withstand Trixi's attack in his heyday, not to mention that he was still using a life-sacrificing blow.

So he used the spiked shell in time to surround himself with a hard shell.

Caught off guard, Trixis shot two arrows at the shell of the crypt spider, and was immediately reflected with two spikes, not only did not cause damage to him, but also resisted his two attacks that happened to be critical.

"Hmph, I'll kill you later."

Trixisi said fiercely, Chen Kai and they all stopped in time, and she was the only one who couldn't stop because the attack speed was too fast, and she became the only one who was reflected, which made her feel very embarrassed.

Five seconds later, the crypt spider had just removed its shell protection and was thrust into its body by several arrows in succession, while a vine emerged from the ground and restrained it tightly.

The Crypt Spider looked desperate - with two seconds of control time, it would never be able to hold on to its remaining less than 10,000 HP......

After 3 seconds, Chen Kai converted 253 points of strength and 67 points of agility, and then used the necromantic resurrection to pull the crypt spider up.

Trixie looked at the attributes of the crypt spider, and then wondered, "Huh? Why don't you just add points with pure strength, but add strength and agility? ”

Chen Kai said confidently: "This is the optimal ratio."

Trixis looked incredulous: "How do you know that such a strange ratio is optimal?"

Chen Kai explained, "Because you need at least 100 agility to trigger critical hits, I won't consider critical hits here."

"If you don't count critical hits, attack damage is nothing more than attack power multiplied by attack speed."

"My total stat is 320 now, and the physical attack damage of the equipment is 30, and then I can make an equation to calculate."

Trixie was stunned: "Equation?"

Chen Kai reacted and explained with a wry smile, "Hmm...... is a special way of calculating mathematics that you may not know ......"

Trixie raised her eyebrows: "I know."

This time, Chen Kai was stunned: "You know?"

"yes, it's an equation with unknowns."

"I just don't understand how this can be an equation," Trish said.

Chen Kai glanced at Trixisi suspiciously, and then explained: "If I set the strength attribute to x and the agility attribute to y, then you can get two equations."

“x+y=320.”

"Output value = (2x+30)*(1+0.005y)."

"Integration yields output value = (2x+30)*(520-x)/200."

"Finally, the output value = [7800+x*(505-x)]/100."

Trixie blinked, "And then?" How do you know what is the maximum output? ”

Chen Kai explained with a smile: "After the formula for the output value is listed, you will find that the number that really determines the maximum output value is the number 'x*(505–x)', which can take the maximum value, and the output value can take the maximum value."

"So, under what conditions can this number reach its maximum?"

Trixis pondered for a moment, and then suddenly realized: "When x=505-x, that's when x*(505-x) reaches its maximum!"

Chen Kai nodded: "That's right, just like a square and a rectangle, when the circumference is the same, the area of the square is the largest."

"Awesome, were you a mathematician when you were alive?"

"Are there mathematicians in this world......

(This level of equation is still quite simple.,Fortunately, I didn't return it all to the teacher.,I usually like all kinds of calculation data when I play games.,But the various algorithms of online games are much more complex than my book.,I can only discuss it a little.,I can't go too deep into it~)