The blue fat still seemed to be a little hesitant, but in the end, he still swung those two huge fists and smashed them into the undead around Song Zheng.

Although its blue body fluctuates constantly, seemingly unstable, as if it could melt at any moment, its attack is so powerful that it can easily smash those ghouls into a puddle of flesh.

Seeing that the blue fat attack was quite powerful, Song Zheng finally breathed a sigh of relief and let him stop the undead for himself, while he himself quickly fled with Catherine in a coma.

When he finally shook off all the undead and took Catherine to hide in a deserted ruin, a strange message suddenly came to his mind, and although he couldn't understand it, he also realized the meaning of this message...... The fire elemental hung up completely.

"It seems that just one fire elemental is not enough, if you can summon a few more, you will be invincible." While thinking about it, Song Zheng quietly looked at his attribute interface, only to find that the skill that summoned the fire element was marked with the words 'cooling' behind it.

"There's a cooldown too?" Song Zheng was a little speechless for a moment, he thought that this skill would be free from the limitation of cooldown time like those thieves' skills, but now it seems that this too powerful skill is still somewhat limited after all.

Luckily, the cooldown time from there wasn't long, just three hours.

Soon, another piece of information came to mind, but this time it was the Void Walker who also hung up, obviously the strength of the blue fat was far inferior to the fire elemental.

Of course, this is also related to the location in Stratholm City, which is the base of the Undead Scourge's in the Eastern Kingdom, and I don't know that there are hundreds of thousands of undead stationed there, and under the crazy attack of these undead armies, no summon can last long.

However, to Song Zheng's relief, the cooldown time of the Void Walker was much faster, only thirty minutes, and more importantly, it didn't take any resources to summon the Void Walker.

"I remember that Agatha and they all need soul fragments to summon demons, only if they contribute enough soul power, those demons in the void will respond to the call, I don't have any soul fragments on my body, why can I directly summon that Void Walker, and there is no need to chant a spell......" Song Zheng recalled the scene of summoning the Void Walker just now, especially the blank appearance of the blue fat after being summoned, as if he didn't realize that he would be summoned at all.

"Isn't this skill a demon that summoned the demon from the void without going through any demon contract at all?" The corners of Song Zheng's mouth twitched slightly, judging from the fact that the blue fat found out about it, he immediately muttered to him, and the blue fat may not be regarded as a demon who signed a contract with him.

"Forget it, the affairs of demons are too complicated, no one can figure out their affairs, let's wait until the future can summon demons such as succubius and other demons that can communicate, as long as they can be used now." Song Zheng shook his head slightly, allowing himself to stop thinking about this issue.

All he needs to do now is leave Stratholme with Catherine!

The city of the dead is currently in chaos, the fires caused by the appearance of the fire element have spread to most of the city, the undead have changed from the previous battle to firefighting, and there are also a large number of undead looking for traces of him and Catherine.

Although Song Zheng and Catherine are currently hiding in the ruins of no one, there are a large number of undead in the city, and sooner or later they will be searched here.

"Why hasn't Catherine woken up yet? If she wakes up and uses stealth techniques together, she may be able to dodge it......" Song Zheng looked at the thin woman in his arms with concern, her body was already scarred, and she must have been besieged by the undead on that dock before.

"I wonder if the healing stone is useful?" Song Zheng's heart suddenly moved, he had just learned the skill of making healing stones from a warlock before, and now he just tried it.

However, what left him speechless was that the skill of making the healing stone indicated that it needed soul fragments!

"It's really strange, you don't need to summon demons, you need soul fragments to make this healing stone...... Looks like I'm going to have to try that healing wave. Song Zheng remembered the scene of using the healing wave to treat Catherine before, and the effect seemed to be very good at the beginning, and now it is time to try again.

"I remember that Agatha and they all need soul fragments to summon demons, only if they contribute enough soul power, those demons in the void will respond to the call, I don't have any soul fragments on my body, why can I directly summon that Void Walker, and there is no need to chant a spell......" Song Zheng recalled the scene of summoning the Void Walker just now, especially the blank appearance of the blue fat after being summoned, as if he didn't realize that he would be summoned at all.

"Isn't this skill a demon that summoned the demon from the void without going through any demon contract at all?" The corners of Song Zheng's mouth twitched slightly, judging from the fact that the blue fat found out about it, he immediately muttered to him, and the blue fat may not be regarded as a demon who signed a contract with him.

"Forget it, the affairs of demons are too complicated, no one can figure out their affairs, let's wait until the future can summon demons such as succubius and other demons that can communicate, as long as they can be used now." Song Zheng shook his head slightly, allowing himself to stop thinking about this issue.

All he needs to do now is leave Stratholme with Catherine!

The city of the dead is currently in chaos, the fires caused by the appearance of the fire element have spread to most of the city, the undead have changed from the previous battle to firefighting, and there are also a large number of undead looking for traces of him and Catherine.

Although Song Zheng and Catherine are currently hiding in the ruins of no one, there are a large number of undead in the city, and sooner or later they will be searched here.

"Why hasn't Catherine woken up yet? If she wakes up and uses stealth techniques together, she may be able to dodge it......" Song Zheng looked at the thin woman in his arms with concern, her body was already scarred, and she must have been besieged by the undead on that dock before.

"I wonder if the healing stone is useful?" Song Zheng's heart suddenly moved, he had just learned the skill of making healing stones from a warlock before, and now he just tried it.

However, what left him speechless was that the skill of making the healing stone indicated that it needed soul fragments!

"It's really strange, you don't need to summon demons, you need soul fragments to make this healing stone...... Looks like I'm going to have to try that healing wave. Song Zheng remembered the scene of using the healing wave to treat Catherine before, and the effect seemed to be very good at the beginning, and now it is time to try again.