After upgrading the building, Gu Feicang did not hesitate at all, and upgraded all the griffins and swordsmen in his hands to royal griffins and crusaders, and his strength skyrocketed again.

However, it seems that after this, his good luck ran out like this, on this day, Gu Feicang rode on the back of the royal griffin, all the way to the border of the land of eternal night, the direction of the endless mountain range, at this time, the watchtower in his mind was a warning, Gu Feicang did not dare to hesitate, and quickly patted the back of the royal griffin, let the royal griffin land, took out his wand, and looked at the watchtower carefully, only to see a huge red dot flashing in the watchtower.

Immediately after, a huge dragon roar was heard, and a huge figure flew in the sky, sturdy white bones, huge bat-like wings full of holes like sails, a huge dragon head, whistling through the sky, seventh-level undead, bone dragon.

The bone dragon, born as a seventh-level undead, is a necromancer, or a powerful lich, using the bones of the dragon's dead, injecting powerful dark power into it, and the powerful undead who were born have a huge body like a dragon, terrifying physical power, and at the same time, they who inherited the dragon's power before their death, although they do not have the combat power of the dragon up to the eighth-level legendary realm, but they can also use magic and use the dragon breath generated by the dark power, which is not bad compared to the real dragon, and is definitely the top existence among the undead.

Although he had already fought with several undead in the legendary realm, their strength had almost exhausted their back erosion, and their comprehensive strength was basically at the fifth level, which was still Gu Feicang saw the existence of more than the fifth level in the true sense, with a huge body and strong strength, which appeared in front of his eyes without any disguise.

Seeing the bone dragon flying by, Gu Feicang didn't dare to hesitate at all, hurriedly picked up his wand, recited a spell, added another covering magic to himself and the griffin, and carefully looked at the huge bone dragon flying in the sky.

Speaking of which, the undead are the mortal enemies of all living beings, but don't think that the undead will only attack living creatures, within the undead, war is also everywhere, after all, in addition to devouring the life breath of living beings, devouring each other's soul fire is also the main way for the undead to evolve.

This time, Gu Feicang encountered such a war, only to see the bone dragon in the sky whistling by, and then, on the earth, a violent vibration sound came, Gu Feicang was more and more careful to hide his existence, and he heard a sound of horses' hooves, and in the darkness, a group of knights whose faces were covered by the dark power galloped from the direction where the bone dragon flew.

With just a glance, Gu Feicang recognized the identity of this group of undead creatures, sixth-level undead, death knight, death knight, which can be said to be the highest level of undead purification.

The Death Knight is the Lich in the process of comprehending the power of darkness, perceiving the greatness of the power of the Grim Reaper, and is willing to give his soul to surrender and guard the majesty of the Grim Reaper, as the forerunner of the Grim Reaper, he is the messenger of the Grim Reaper on land, with a strong fighting spirit, and also has the power to turn the dark power into a nightmare mount, and can fly with the power of the Nightmare, and it is also the highest form of the undead.

I saw that under them, riding a nightmare burning with ghost fire, chasing the bone dragon, I saw a knight at the head, holding a long knife, with a jump of the nightmare under him, the long knife in his hand slashed into the air, a fierce fighting spirit, pounced on the bone dragon in the sky, with the sound of breaking the sky, towards the wings behind the bone dragon.

"Whoa!!" In the face of the knight's sword, the bone dragon in the sky seemed to be enraged, and roared, and the dragon groan generated by the collision of bones suddenly sounded in the air, and then I saw the big mouth of the bone dragon, and the dark power gathered into a different kind of dragon breath, coming towards that fighting qi.

Hiss, a hissing sound came, and I saw that the fighting energy was instantly turned into ashes by the dragon's breath, and the corrosive power of the dark power devoured all those fighting spirits, and came straight towards the knight on the ground.

Seeing this, the unspeakable knight captain waved his hand violently, and a team of death knights behind him instantly grabbed the reins in his hand, and then, he saw that one by one the death knights raised the long knives in their hands one after another, and swung forward violently, boom, and a powerful fighting spirit suddenly swept away, and the dragon's breath exploded in mid-air, and the violent air wave instantly turned the stones on the ground into pieces.

Seeing this scene, Gu Feicang hurriedly turned around and landed behind the griffin, only to see the griffin's wings spread out, blocking in front of him, bumping and bumping, and stones comparable to bullets smashed on the griffin's body, fortunately, the upgraded royal griffin's defense has been greatly increased, just like the wings made of steel, although they were crumbling by this wave of air and stones, they were blocked in the end.

Seeing this, Gu Feicang suddenly gasped, the sixth-level death knight and the seventh-level bone dragon were really much stronger than the fifth-level powerhouses, such a battle was not something that he could get involved in at all, and immediately, Gu Feicang carefully pulled the griffin and retreated little by little, for fear that one would be accidentally discovered by the undead of both parties.

Don't look at the bone dragon and the death knight now, once they find Gu Feicang, the first thing is to turn their heads and deal with him, he can't solve one of them, let alone be fought by two parties.

However, although Gu Feicang thought well, it was not easy to really want to leave, the scope of the battle between the bone dragon and the death knight was too large, here, he had just taken a step, in the sky, a huge white bone dragon tail swept over fiercely, and almost hit Gu Feicang, making him dare not move for a while.

Finally breathed a sigh of relief, and immediately, the fighting spirit of the death knight spread out again, turning the surroundings into a mess, and at the critical moment, Gu Feicang did not dare to cast magic to attract the attention of the other party, so he walked around, or kept spinning on the edge of the battlefield.

"Damn, won't you two fight in another place?" Looking at the Death Knight and the Bone Dragon who were constantly fighting, Gu Feicang couldn't help but feel guilty in his heart.

I don't know if I sensed the belly slander in Gu Feicang's heart, but I saw that with the flick of the bone dragon's tail, a dragon's breath spurted out, instantly hitting a death knight who did not react in time, and in a wail, the death knight instantly turned into ashes, but at the same time, the other death knights also waved their long knives one after another, and the cold blade slashed fiercely on the bone dragon's sternum, cutting it off in an instant, and the dark power suddenly overflowed like a blood donation.