In other words, if you don't cooperate, you will pay 80 and get 100, with a rate of return of 25%, and if you cooperate with 40 and 55, with a rate of return of 37.5%, then it must be the most cost-effective cooperation.

There is also a premise here that Su Yu knows how to negotiate conditions with the black snake, otherwise if it is really calculated according to three or seven points, it will definitely be a loss, and there is not even a 1% rate of return.

But if the black snake insists on three or seven points, Su Yu will definitely not agree, she would rather choose to be tired and find a way to kill the leader of the natural disaster by herself.

Thinking about it this way, the choice to save the black snake in the first place was really right.

Otherwise, if a new boss beast is refreshed, let's not talk about whether there will be a good result in the case of cooperation, I'm afraid that Su Yu will choose not to cooperate, and finally kill the leader of the natural disaster, and the leader beast will come out to grab something.

After the death of the leader of the natural disaster, there is probably no limit to those things, no matter how they want to grab them, they are absolutely powerless to resist after a fierce battle.

Su Yu almost rolled it into her face, trying to 'suffocate' her Lingbao and hugged it, then closed her eyes.

……

……

On a new day, Su Yu took fifty people to test the information of the leader of the natural disaster according to the plan, and worked for a whole day, although a lot of resources were consumed, but the result was good.

Su Yu discovers two fatal weaknesses of the Scourge Boss.

One is that it may have been in the dark environment of the cave for too long, so it has an obvious reaction to the light source, and it just so happened that Su Yu asked An Jie to make a device that can generate light sources, which can be said to come in handy during battles.

With sufficient ambient light sources, the Scourge Boss will have a negative status called 'Impaired Vision'.

This debuff lasts for half an hour, during which the Scourge boss's accuracy is reduced by 5% and his evasion rate is reduced by 5%.

The reduction in hit rate is actually nothing, because its attack frequency is not low, for monsters with high attack frequency, the number of times can make up for the lack of low hit rate, for this reason, Su Yu can only arrange a few more people to withstand the attack of the Scourge Boss, so as not to be seconds.

The biggest advantage of this debuff is the reduced evasion rate.

The dodge rate of the boss-level monster itself is not low, not to mention that there is a gap in strength, and the bonus of the dodge rate is even higher.

The damage is reduced when the evasion rate is high, and similarly, the low evasion rate is equivalent to increasing your own output ability in disguise.

The second weakness has to do with the Scourge boss's own skill mechanics.

After experiments, it was found that among the four skills of the Scourge Boss, the black slime is corrosion, the yellow slime is slowdown, and the green slime is poisoning, all of which are exactly the same as Su Yu's previous speculation.

As for the colored slime, it has not appeared once so far, and Su Yu naturally doesn't know what the effect is.

In addition, she also found that these four skills cannot be triggered at the same time, and there is a high probability that they have a shared CD (after using the skill, other skills with a shared CD will also enter the CD), and the cycle condition for skill triggering is time.

The conclusion is that every three minutes, the Scourge Boss will attack with a slime skill of one color depending on a certain condition at the time.

As for what this condition is, Su Yu didn't find out for the time being, she tried to control the damage, control the distance, and control the number of targets...... In short, she has tried everything she knows that may be a variable in the condition of the skill, but there is still no result.

But even that didn't matter, because Vivien's anti-corrosive potions and corrosive healing potions were ready.

And the deceleration itself is not fatal, and the effect of the deceleration can be offset with an agility potion, according to the theory of relativity, one deceleration and one acceleration, which is equivalent to no deceleration.

There is also an antidote to poisoning, so even if you don't know the trigger conditions for each of the four skills, it won't affect the killing of the Scourge boss.

With the personnel, the props are ready, the information is almost collected, and even with the help of the Black Snake, it seems that from the current point of view, it can be said that killing the Scourge Leader tomorrow can be said to be inevitable.

Even if it's not tomorrow, it's the day after tomorrow, according to the plan, these two days are definitely enough time for Su Yu to lead fifty people to kill the leader of the natural disaster.

It's impossible to say that you don't have to worry at all, after all, there is a colored slime that I haven't seen before, and I'm afraid that this will become a variable.

But now, they have all made preparations for this, and after spending so much money, it is impossible to give up anything, so after a night's rest, on the forty-second day of the digital world, that is, the twelfth day of the natural disaster, Su Yu took fifty people to the cave again.

At the mouth of the cave, Su Yu saw a black snake pretending to be a statue not far away.

Su Yu asked everyone to check their equipment and weapons, drink potions, wear runes, and eat buff food.

In the meantime, she came to the Black Snake and worked with it on a time for it to strike.

'I made it clear yesterday that my attacks can only reduce this monster's state to half, so the sooner I strike, the better, understand? ’

The Scourge Leader's HP is 500,000, and the meaning of the Black Snake's words is that it is not that the damage it can cause is 250,000, but that it can only suppress the Scourge Leader's HP to 250,000.

In other words, if the Black Snake is allowed to attack when the Scourge Boss's HP is only 400,000, then the Scourge Boss's HP will still only be pressed to 250,000, not 150,000.

Therefore, although Su Yu can arrange the time for the black snake to shoot, the sooner the black snake strikes, the better, and it is best to shoot at the beginning, because in this way he can hit the limit damage of 250,000.

"I understand, how many times can you shoot? I can't guarantee it right the first time. ”

Su Yu knew that Black Snake's off-site assistance was generally limited, and it was impossible for you to try it indefinitely, which not only lost the difficulty, but also was not very reasonable, after all, Black Snake was equal in strength to the leader of the natural disaster, and he could get out of half of the opponent's blood every time he beat him, which was impossible to think about.

'I'll shoot up to three times a day, and you'll only have five chances to arrange for me, and after five times, I'll not help again, but if the Scourge leader dies, the spoils will still be given to me. ’

"Okay, I see."

Su Yu nodded to indicate that he understood, and then, the black snake changed from the size of a giant to the thickness of a finger, and finally wrapped around Su Yu's wrist, turning into something similar to a bracelet.

When the black snake turned into a bracelet, Su Yu found that the system prompted her to obtain a special equipment called the 'Ring of the Giant Snake', Su Yu looked at the things in her hand and chose to investigate.