The arrogant Bone Dragon Lord didn't know what to do, he might have missed a great opportunity, although Locke was just an inconspicuous first-level skeleton, he was not an ordinary undead skeleton, and he was not the same as the other servants of the Bone Dragon Lord.

If the Bone Dragon Lord asks Locke about his secret, Locke will have no way to hide it because of the existence of the servant contract, unless Locke is willing to bear the backlash of the undead contract.

After installing the bone shelf, Locke followed the fourth-level mage skeleton to hunt in the realm of the undead.

Becoming a servant of the powerful bone dragon, Locke is not without gain, that is, he has gained the friendship of the skeleton mage.

After knowing that Locke was a special mage skeleton, the intermediate skeleton mage was extremely happy.

Under the guidance of the mage skeleton, in just two days, Locke was able to cast the first-level undead magic of bone spear shooting. Of course, compared to the intermediate mage skeleton, Locke's bone spear shooting power is far inferior to it, and the accuracy and strength of the bone spear are much worse.

The exertion of necromancy has nothing to do with the strength of the bones of the body, but only with the strength of the soul fire and the caster's ability to control.

However, the last thing that is lacking in the undead plane is the power of the undead, that is, the magic power of the undead, even if it is a skeleton warrior, they will use the power of the undead to temper the bones of the body, and there will also be the power of the undead in the bones.

However, at Locke's level, the bone spear shot can also damage a first-level skeleton warrior, of course, provided that it can hit the opponent at close range.

For two days, Locke followed the fourth-level mage skeleton, and once the other party found the first-level undead creature that had just been born in this territory, he would let Locke go and kill it.

Over the course of two days, Locke had devoured the soul fire of three first-level skeleton warriors. Of course, if Locke wants to reach the level of advancement, he needs to devour at least dozens of them just by devouring the soul fire of the undead creatures of the same level.

For Locke, the quickest way to advance is to find the soul fire devouring of a higher-level undead creature. Almost devouring the soul fire of one or two higher-level undead creatures, Locke would be able to advance to the rank of second-level skeleton mage.

However, the second-level undead creatures in the Bone Dragon's territory are basically the contract servants of the Bone Dragon, and they are not something that Locke can kill, unless Locke dares to violate the servant contract.

Originally, the reason why Locke and the mage skeleton acted together was that he hoped to use the powerful perception ability of the mage skeleton level 4 to discover more undead creatures and slash and devour them to advance. But then Locke discovered that there were a lot of bones in this area, including the hard bones left by fallen middle-level undead creatures, and after discovering the bones of these powerful undead creatures, Locke naturally had the idea of casting bone alchemy and refining them into his own bones.

However, staying with the skeleton mage, Locke naturally did not dare to perform bone alchemy, for Locke at this time, bone alchemy was also one of his several hole cards, and it could not be exposed easily.

Moreover, Locke has learned to shoot the undead magic bone spear, and at this time, even if he stays with this skeleton mage, it is not much use, and he can't reveal his own details, so he naturally has the idea of separating from the other party.

Locke casually found a reason to separate himself from this mid-level skeleton mage. The skeleton mage was also a little surprised by Locke's request to act separately, but he quickly agreed to Locke's proposal. Although he was with Locke, he was able to communicate more than half, but after more than two days, he also communicated about the same.

Moreover, Locke is only a first-level skeleton mage, a difference of several levels, and is much slower than a fourth-level skeleton mage in terms of speed. These days, this skeleton mage has also found the inconvenience with Locke.

After separating from the skeleton mage, Locke also shifted his goal from finding undead creatures to finding the hard bones suitable for his refinery.

As time passed, Locke had been wandering around the area, and his bone claws were always refining with a powerful bone.

Although Locke did not hunt undead creatures when refining bones, his own strength continued to improve.

A large amount of powerful bone essence continuously strengthened Locke's bones all over his body, making Locke's bone frame stronger and stronger.

Before he knew it, Locke's bones had reached the skeletal strength of a mid-level skeleton warrior.

For most low-level undead creatures, strength comes in two aspects, the level of soul fire and the strength of the body.

When a Skeleton Warrior's Soul Fire is enhanced and promoted, the bones will be strengthened by absorbing the power of the undead in the bones and in the undead plane for a period of time.

After the skeleton mage is promoted, it will also strengthen the body bones, of course, the strength of the body bones of the average skeleton mage is weaker than that of the skeleton warriors of the same level, and the melee talent is worse, and its combat still relies on the undead magic it masters.

With bone alchemy, Locke is equivalent to not needing to advance, he can strengthen his body bones to a higher level and have stronger combat power.

Moreover, Locke is a mage skeleton, in addition to being able to surpass skeleton warriors of the same level in physical strength, he can also cast undead magic, just like a bone dragon, it belongs to the undead creatures of demon and martial arts.

After Locke's body bone strength reached the same level as that of a fourth-level skeleton warrior, he couldn't find stronger bones to strengthen his body.

In the undead plane, although powerful undead creatures often fall, the bones left behind are not permanently in optimal condition. As time passes, the power of the undead that is powerful in the bones will continue to be lost, and the hardness of the bones will continue to weaken, and if it lasts long enough, it will even pass away with the wind and directly weather.

The reason why Locke was able to find a lot of hard bones in this vicinity was also because not long ago, a great war broke out here, and more than a dozen mid-level undead creatures fell one after another. It didn't take long for the bones left behind by these fallen undead to remain hard, cheaper than Locke.

In the process of searching for powerful bones, Locke also encountered several first-level skeleton creatures, except for one who was directly killed by Locke to devour the soul fire, the others were all contract servants belonging to the Bone Dragon Lord, and Locke was not allowed to attack them because of the Bone Dragon Lord's orders.

After his body bones were strengthened to the level equivalent of a fourth-level skeleton warrior, Locke's strength increased greatly, and unless he encountered a mid-level undead creature, even if he encountered a third-level undead creature, Locke was sure to win the battle and kill it to devour his soul fire.

The soul fire of a third-level undead creature can at least allow Locke to directly advance to the second-level skeleton mage level.

After discovering that he could not continue to strengthen his bones, Locke rushed towards the area away from the Bone Dragon Lord. It is hoped that more undead creatures can be found in the broader undead plane, and their soul fire will be devoured and evolved.

Because of his powerful wisdom and bone alchemy, Locke can easily hunt and kill undead creatures of the same level and higher levels, and quickly improve his strength.

The reason why Locke wanted to stay away from the Bone Dragon Lord was because he didn't have the idea of trying to get rid of the Bone Dragon Lord's senses.

Before he knew it, Locke had come to the location of the zombie lord's territory.

Before the birth of the bone dragon Gregoria, there was only one lord-level zombie lord in this vast area.

"Well, it is. A strange undead creature covered in pitch black in the shape of a bird appeared in Locke's perception.

When Locke discovered this undead creature, the other party also sensed Locke's existence, after all, both sides were first-level undead creatures. In the perception of the soul fire, in Locke, the other party is not a contract servant of the bone dragon lord, that is, a target that can be used for his own attack.

Although the other party is only a first-level undead creature, as long as he can improve his strength, Locke has no reason to let it go.

After spotting Locke, the black undead creature in the shape of a bird jumped and quickly ran in front of Locke.

The undead creature that Locke encounters is actually a low-level ghoul in a group of ghouls. Ghouls, despite their bird-like shape, do not have the ability to fly. Ghouls are not large in size and have relatively small strength, but they are faster than ordinary undead creatures of the same level, and the speed of first-level ghouls is faster than that of many second-level skeleton warriors.