In the time that followed, the search area was also expanding, and even on the 7th day, the Big Three had to send the remaining 500,000 ghoul army as pathfinders, because the 500,000 ghouls sent some time ago had been rapidly widened due to the large exploration area, and the distance between each ghoul had been rapidly widened anyway, anyway, before sending 500,000 reinforcements, the spacing between each ghoul had reached more than 100 meters, and it can be said that the entire exploration team had been directly sparse and dispersed by the vast terrain.

And this is just an exploration in the poisonous fog area filled with poisonous fog, Wang Fan can't even imagine how vast the world outside the poisonous fog area is, of course, there is another possibility, that is, the poisonous fog area occupies most of the places, but no matter which one is possible, the vastness of the entire middle thousand plane has really exceeded Wang Fan's expectations, because the area that the undead legion has explored now is basically the same as a small thousand plane!

Of course, this is not what Wang Fan is most concerned about, what Wang Fan is most concerned about now is the news from the ghost fleet and the deep sea ghosts, they actually arrived at an ocean after following the river for a full 9 days.

Don't wonder how they know they're arriving at an ocean and not a large lake, just because they're ghosts of the sea, so they can tell the difference between the ocean and the rivers and lakes at once, so they feel it as soon as they enter the water.

Of course, it was not the ocean itself that attracted Wang Fan's attention, but the shallow area of the ocean.

There doesn't seem to be anything strange about it itself, the only feature is that the poisonous fog is much thinner, so it looks like the scenery is good, but for Wang Fan, a guy who has reached the epic level, the scenery is dispensable, after all, he is not a druid who loves nature or a shaman who communicates elements, so in fact, this place was not noticed by Wang Fan at first, until later, after a ghost ship sailed through this shallow shoal and lifted a layer of sand, a powerful magic wave came out of the sea in an instant.

After this magic broke through the sea and transmitted his own breath, Kel'thugad, as a mage, was the first to feel this powerful magic, although it was far less heavy than the source of the earth, but it was also an energy that should not be underestimated, so Kelthugad immediately found Anubrak and Rivendell to discuss, and finally unanimously decided to send the newly completed swamp plane No. 1 floating fortress to go out to see what was going on, the commander was Kel'thugad, with 30,000 frost dragons and 100,000 gargoyles. 100,000 saboteurs, 40,000 meat grinders, and all the Ghosts of the Seas and the Ghost Fleet.

Soon in less than half a day, Kel'thugad arrived at the area where the incident occurred on the Swamp Plane No. 1 Floating Fortress.

However, after arriving at the scene, Kel's face was obviously relaxed, because he felt the characteristics of this magic power, that is, the magic power of the water attribute, but it was not owned by one individual, but was made up of a large number of individuals, so the danger was greatly reduced.

However, just in case, Kel'thugad sent a ghost ship and 500 ghosts of the deep to find out.

And the ghost ship and the deep sea ghost who received the order naturally did not hesitate, and directly went into the water to explore the crypt that revealed a lot of magic power, which is also the only benefit of the artifact undead, that is, the absolute order is forbidden, it can be said that even if they are allowed to commit suicide, they will not hesitate to execute, and the original undead can't do this, because although the original undead will be suppressed by the rank and enslaved, but let them commit suicide and other things can't be done, after all, the original undead are all thoughtful and intelligent, even if these thoughts are not sound (level 4-6), but it is impossible to make them commit suicide。

Soon the ghost ship and the deep sea ghost approached the underwater cavern that exposed the entrance of a black ghost cave, and without the slightest hesitation, the ghost ship rushed directly into it, and then a large number of deep sea ghosts rushed into the underwater cave with the ghost ship like sardines.

The cave was full of seawater, and a small amount of strange crystals glowing blue on the stone walls brought a glimmer of light to the dark cave, but it didn't matter, after all, the undead could see at night, so they didn't need vision.

Then came the tedious voyage, with no enemies, no anomalies, and nothing in the cavern except for the abundance of magic.

Obviously, what really exudes this huge magic is still ahead!

Moving on, the ghost ship and the deep sea ghosts encountered a number of forks, and then had to divide their forces, among which the ghost ships entered the largest fork with a hundred deep sea ghosts, and the others advanced in groups of a dozen into other large and small forks.

Some of the subsequent forks in the road were dead-end, and as a result, the deep-sea ghosts had to retreat, while others had new forks, and eventually the exploration team had to divide again.

Finally, a small group of deep-sea ghosts landed, after a long time in the water, the water surface actually swam shallower and shallower, and then later, even the deep-sea ghosts had to show their bodies to run on the sea surface, and after that, after more than ten minutes of running, they felt that there was no trace of water under their feet, and they found that they had gone ashore, but the next scene completely attached to them Wang Fan, Kel'thugad's thoughts flew out in surprise as they saw a new cave, a cave that was all blue.

Of course, it's not that the cave itself is blue, but because a blue crystal covers the entire cave, which is a real blind spot cover.

Some of the crystals are more than a few meters long, and these crystals are the source of magic.

And Wang Fan also immediately thought of something the first moment he saw the crystal, the same mage necessity that will appear in most magic novels: magic crystal.

Sure enough, after then inquiring about the well-informed system, Wang Fan also got the confirmation of the system, this is the legendary magic crystal, and this cave is a complete magic crystal mine with huge reserves!

It was precisely because of this unexpected harvest of the magic crystal mine that Wang Fan temporarily turned his attention to the ocean, after all, there was nothing worthy of his attention on the ground now!