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In the deep cave, as soon as Merlin stepped in, he felt a cold breath that went straight to the bone marrow.

However, although it was pitch black in the cave, it was nothing to Merlin and other spellcasters, who had the mental power to see everything clearly in the night.

Merlin walked at the front, always vigilant, as long as there was the slightest movement, he would stop, and only after confirming that there was nothing unusual before continuing to walk.

"Wait, what's the sound up ahead?"

Merlin suddenly stopped, and listened with his ears sideways.

"Squeak".

The voice was getting closer and clearer, Merlin's face changed slightly, and he immediately reminded loudly: "Be careful, it may be a dark blood bat!"

As soon as the words fell, everyone saw that in the depths of the dark cave in front of them, a huge red light suddenly appeared, and it flew towards Merlin and the others extremely quickly.

"Cryomy!"

Merlin immediately cast a cryophilic spell, freezing almost all the narrow passages in the cave.

"Bang".

With a loud bang, a powerful impact, and the red light on the opposite side was not affected by the freezing technique at all, it directly shattered the thick ice crystals and rushed straight towards Merlin and the others.

"Hiss".

At this time, Merlin saw the red light clearly, but he couldn't help but gasp.

In the red light, there was a huge dark blood bat, compared to the dark blood bat encountered outside the cave, this dark blood bat was larger, the whole body was as red as blood, and its appearance was extremely ugly. This strange dark blood bat let out a piercing "squeak" sound, and its speed was even faster than when Merlin used the Wind Blast.

The speed of the Dark Blood Bat was too fast, and Merlin only had time to release the "Fireball Technique" in a vain attempt to block the speed of the Dark Blood Bat.

"Bang".

But it didn't work, the dark blood bat ignored the fireball that exuded a terrifying temperature, and directly smashed the fireball, its big mouth opened, and instantly spewed out a black mush, emitting a foul-smelling slime.

All this changed so quickly that Merlin didn't have time to react, so he could only avoid it for the time being.

Lolinka in the back was also alarmed and quickly dodged, but Master Danbei was not so lucky, because the black slimy mucus, the speed was too fast, and it was in a dark cave, so Master Danbei only had time to release an earth-based defense spell.

A thick earthen wall quickly rose up and blocked in front of Master Dambei, almost cutting off the passage of the cave.

"Snort".

The black slime spewed out by the dark blood bat seemed to have a strong corrosive nature, and it was so corrosive that it was incredible, the earthen wall in front of Master Danbei only slightly blocked this mass of slime for a moment, and then, the earth wall was corroded out of a big hole, and it also took advantage of the residual momentum to directly stain Master Danbei's body.

"What the hell is this?"

Master Danbei looked at his body in shock, and was quickly corroded into a blood hole, and the intense pain made him let out a terrible scream, and then, Master Danbei fell to the ground, the expression on his face was very hideous.

"Hiss".

Merlin gasped, fortunately he didn't release the Earth Guardian just now, although he had some confidence in the Earth Guardian, but seeing the fate of Master Dambei, this dark blood bat was obviously extraordinary, and it was difficult to say that his Earth Guardian could hold it.

"Hurry back. ”

Merlin let out a loud roar, knowing that this dark blood bat was very unusual, and besides him, Lolinka couldn't even resist several attacks from this dark blood bat.

"Squeak squeak".

The dark blood bat screamed again, and then, a trace of the rich dark element began to converge, and in such a pitch-black cave, the dark elemental monster had an innate advantage.

This dark blood bat was gathering dark elements at this time, obviously trying to cast a spell.

Merlin was shocked in his heart, he finally realized that this dark blood bat was so different, the elemental monsters that could release spells were quite terrifying, like ordinary ice giant wolves and ordinary dark blood bats, they couldn't release spells.

This dark blood bat was actually able to cast spells, which only the Blood Bat King could do.

Feeling the increasing fluctuations of the dark element, Lorinka couldn't help but shout: "It's not good, is it the Blood Bat King?"

Once the Blood Bat King is born, it is comparable to a fourth-level spellcaster, belongs to a hegemon, and has a high level of intelligence, at this time they are no longer called elemental monsters, but elemental creatures.

From elemental monsters to elemental creatures, it is an essential metamorphosis, elemental monsters, at best, are only some low intelligence, born from some special places where the elements are rich, and their strength is weak, and ordinary entry-level spellcasters or elemental swordsmen above the intermediate level can deal with it.

However, once you become an elemental creature, you can control the elements and open up your wisdom, which is no different from ordinary people, and you are also gifted, and you have absolute control over a certain series of elements.

Such elemental creatures are comparable to those fourth-level mages in the Dark Spirit Realm who build towers alone.

"Whew!"

The spell released by this dark blood bat is a black line, which melts into the pitch-black cave, which is difficult to guard.

"Is it a dark ray? and it seems that it is only infinitely close to the effect of a first-level spell, this is not a real Blood Bat King, it should be a Blood Bat King who is still transforming. ”

Merlin's mental power can keenly detect the dark rays that melt into the night, and so does Lorinka, so they can easily avoid it.

But Catherine and Capes were not so lucky, Capes was an elemental swordsman at the peak of the third level, and he also had a certain sense of danger, so sensing that there seemed to be danger, he immediately drew his big sword and blocked it forward.

"Click".

But it doesn't have any effect, the biggest feature of the dark ray is penetration, with a strong piercing effect, not to mention just an ordinary iron sword, even if it is hard black iron, it can be easily pierced.

The zero-level spell Dark Ray in the Dark Spirit Realm is actually some inspiration from the Blood Bat King, and after the research of powerful spellcasters, a new zero-level spell was finally born.

The real dark ray is the Blood Bat King's talent spell, which is comparable to the terrifying fourth-level spell, and the dark ray in the Dark Spirit Realm is far worse than the Blood Bat King's talent spell.

The dark ray shot through Capes's big sword, and the remaining strength did not decrease, directly piercing Capes's palm, and even Catherine behind Capes, the entire right arm, was also pierced, and Catherine almost fainted in fright.

All of this happened in an instant, and Merlin had nothing to do but watch Capes and Catherine being pierced by the rays of darkness.

As Merlin had said outside the cave before, he was able to save Catherine and Capes once or twice, but not necessarily a third time, but their luck was good, one injured his palm, the other injured his arm, and finally didn't lose his life.

This experience can be regarded as a profound lesson for them.

"Squeak squeak".

This dark blood bat, which was already beginning to transform towards the Blood Bat King, made a piercing sound from its mouth again, and it was still brewing a more powerful attack, and the crisis still enveloped Merlin and the others.