After accepting the gold coins, Dongfang Xiao handed over some jars to Barr, and after the two chatted for a while, Barr left, and Dongfang Xiao looked at the 600,000 gold coins in the card, and grinned excitedly, with these gold coins, he would soon be able to open a sub-profession and blood qi skills again.

The conditions for opening the Blood-Qi skill are the same as those for other systems, and a special item is still required, which is the so-called "Ogre's Soul".

In fact, this so-called "ogre's soul" is not the so-called real soul, but a special potion made of revenge soul stones, small red crystals and ogre potions in a certain proportion through alchemy, and the power of this potion is to stimulate the power of blood and qi in the user's body, so that he can successfully become a berserker.

There are still some small red crystals left here in Dongfang Xiao, and the ogre's potion is not a big problem, but this revenge soul stone is not something that can be obtained casually, there is only one source of this revenge soul stone, and that is the undead.

There are many types of undead, and the reasons for their formation are not the same, in addition to the undead who exist in the form of souls, too many undead are born because of the corpses or bones after death because of some influences, so that consciousness is born again, although the birth of the undead comes from the dead corpses of creatures, but the consciousness born from the bones of these corpses can be completely different from the consciousness of the original body, it can be described as a new soul, at most it just has some residual memories, The more powerful the creatures are, the more powerful they are to give birth to the stronger the undead. Therefore, the remains of ordinary cultivators cannot be buried directly, and some special methods of disposal are required.

In addition, the birth of the undead also has a certain relationship with the resentment at the time of death, if the creature has no resentment before death, then the probability of becoming an undead after death is lower, and if there are strong negative emotions such as unwillingness and anger before death, then the probability of forming an undead will also be greatly increased. If the negative emotions are too strong, the soul of the deceased is likely to become a "wronged soul" or even a stronger soul undead.

The biggest difference between the soul undead and the undead born from the corpse is that their souls have not changed, so most of them retain the memories and consciousness of their lives, although these consciousnesses are likely to be blinded by powerful resentment, but when the strength of its undead reaches a certain level, these memories will also return, and the soul undead are originally intelligent creatures, but because of death, they have been transformed into the form of the soul.

The undead born from corpses are different, even if they become undead, most of them do not have any reason and wisdom, they will only act by their own instincts, and when their strength gradually improves, their wisdom will become stronger and stronger, in a way, the undead of the corpse system, wisdom is a symbol of their strength. Some of the undead of the corpse system, because they have a lot of grievances before death, although the soul is gone, this resentment will still remain on the corpse, and the resulting undead will be more violent, and the so-called "revenge soul stone" is obtained from such creatures.

Of course, there are also some undead who have retained their souls and all of them, but they have been transformed into undead lives by humans or other beings, and these undead are equivalent to other undead races, with unique advantages and often stronger strength.

As for the undead in this world, Dongfang Xiao is only at the stage of "hearing and hearing", and he has never seen it once, let alone obtained any "revenge soul stones" from them.

Fortunately, the store can buy revenge soul stones, and the price of this revenge soul stone is not cheap, each one has a huge amount of 20,000 gold coins, and making "ogre's soul" requires two revenge soul stones, thinking about his current alchemy level, Dongfang Xiao still gave up the idea of making his own "ogre's soul".

And the idea of asking for help, after Dongfang Xiao's careful consideration, finally chose to give up, after all, the revenge soul stone is something obtained from the undead, and the undead are also a taboo for alchemists, especially the Alchemy Guild, which has always been quite opposed to the connection between alchemists and the undead, and the reason is that there have been alchemists who have used alchemy to create a large number of undead.

Speaking of which, this alchemist, who used alchemy to create a large number of undead, has another identity, that is, a necromancer.

Necromancer is a special profession, although it uses the same dark power as the dark magician, but there is a clear difference between the two, the necromancer's attack method, most of them are realized by the undead, not so much that they are magicians, but rather that they are "summoners" is more appropriate, in addition to their own strength level, the number and level of the undead are also an important part of their strength.

However, except for some special planes, the existence of the undead is quite difficult to find, many undead have just been born, they have been wiped out, there is no chance of growth and signing a contract with the necromancer, although the necromancer is often stronger than the magician of the same level, but signing a contract with the undead is a very difficult thing, often a waste of their time.

Of course, there are always some special places that become the nest of the birth of the undead, and these places are the "Feng Shui treasure land" that the necromancer is looking for, and some powerful necromancers will even look for some small planes where the undead are thriving, so as to sign a contract and enhance their own strength, but the search for these small planes is also very difficult, and it is very possible to find nothing for decades or hundreds of years.

Because of this, some necromancers have also begun to seek other methods, and the one mentioned just now came up with the method of alchemy to create the undead, I have to say, from the perspective of alchemy alone, this alchemist is very good. However, although the alchemist succeeded, he also caused the wrath of the Alchemy Guild, and was eventually killed by the strong men sent by the Alchemy Guild, and since then, the alchemical research of the undead has become a taboo, and this taboo has not changed to this day.