The synthetic purgatory machine needs to knock down four key guardians, but it doesn't need to kill the guardian in the fourth act repeatedly, because he lost the formula. In addition, in order to be able to synthesize machines, you will need a blacksmith of 10 level. The cost of synthesis is 12000 gold.

I tested the probability of the key dropping several times, and I noticed a pattern. I didn't lose my key when I killed the guardian at monster strength level 7 without superimposing five layers of courage, but after superimposing five layers, the drop rate was still not 100%. Then, I tested under the intensity of 9, and when I didn't have five layers of courage, I found that I still couldn't guarantee 100% when I fell, but after stacking five layers, I could get a key every time. I know that farm intensity 9 may not be feasible for everyone, but in any case, combined with diablo 3's courage in this difficult situation, you can definitely fall.

First act

Odeg, the key keeper, appeared in the initial misery. Its refresh point is completely random-I have encountered it in small stations, near regional entrances and exits and other places. It left the key to destruction.

His main attack is spear throwing, with three fireballs and imprisonment.

It is worth noting that if you want to drive a purgatory machine, then this guardian is your final goal. You should choose the last task in the first act to fight and return to the new Tristram. Because this is the only task that allows you to enter the polluted apartment (details are as follows).

Act ii

The key keeper Sokahr appeared in Daegu Oasis. Similarly, his refresh position is completely random. It left the key of hatred behind. Make sure you have five layers of courage before you look for it.

Guardian Sokka is a sandhill blade demon, so his main attack skill is rotating blade. And according to the type of monster, it has its own projectile deflection ability. He also has artillery and lightning reinforcement. Other special abilities failed in the test, so I cut them directly with Saiyan. I saw one with a projectile shield.

Act iii

Sharis, the key keeper, appeared on the stone pedestal. The battlements have actually changed (I have played six elite groups here instead of the usual 2-3 groups), and the defenders usually wait for me at the gate of the stone base. Therefore, it is very convenient to brush, and today's battlements become more efficient due to the increase of elite density. What he left behind was the key to terror.

Sharis' monster model is a demon hunter, so he has teleportation ability. Unlike other trolls, he has a skill similar to corpse rain. He also has a frozen domain type attack, which won't freeze you, but will greatly slow you down. In addition, it also has illusion skills.

Act IV

Neckarat, the key keeper, appeared on the 1 floor of the silver minaret, which was really disgusting. His monster model is a fear of demons, which means that he has a curse effect, which reduces all healing effects by 75% ... for 6-8 seconds. What he left behind was the recipe: the plan: the hell machine.

Neckarat's basic attack is frontal lightning, with a curse of -75% healing effect. AoE damage point fire attack. At the same time, it has the ability to imprison and repel.

Point: As a barbarian, I can't stand this guy. I had to catch up with him and let the sprint finish the output. So far, he is the most annoying of the four. But fortunately, you only need to kill him once. Remember, you need to stack five layers of courage to keep this guy down.

multiple

As mentioned above, you need a blacksmith of 10 to learn the recipe. You can make a purgatory machine if you learn it.

Chaos field

As I said before, the chaotic country is in the house behind the doctor. In order to break the door, you need to activate Mu's 10 mission, especially the "Back to New Tristram" mission. Hold down the Shift key to attack the door. You will find an empty room, in which you can activate your purgatory machine, thus creating a teleport to transport you to chaos/turmoil/disharmony, where there will be two Boss waiting for you.

Create a ring of fire in hell

The recipe of Hellfire Ring (2 million gold) can be bought at A Niu, the vendor in the second act. The person who teamed up with me said that I had to choose the last task of the second act to buy it. I haven't tested this yet.

The formula needs to be studied by jewelers of 10 level. Now, you can make four types of rings. It is conceivable that the materials are three legendary materials dropped by Super Boss, and there is a negligible 50,000 gold.