I Can Make Everything Level UP

"Hehe, I guess my next project will be a magic submarine, a small one will be fine," Billy thought. "Not like I need an airplane, or something faster than the magic aircraft… Anyway, how does pressurized air in a submarine work again?"

In submarine technology, a vent is a valve fitted to the top of a submarine's ballast tank to let air escape from the top of the ballast tank and be replaced by water entering through the openings called "flood ports" or "floods" at the bottom of the tank. In earlier times, the openings at the bottom of the ballast tank were fitted with valves.

To get a submarine to the surface, the main vents in the top of the tank are closed and high-pressure compressed air is blown into the ballast tanks, forcing the water out through the flood ports at the bottom of the tank. Replacing ballast water with lighter air reduces the vessel's total mass. When the weight of the vessel becomes less than the weight of the volume of displaced water, buoyancy becomes positive, in accordance with Archimedes' principle and the submarine begins to rise… That was more or less what Billy recalled from reading about it in an old article about the subject.

"It isn't that complicated, so it will be pretty fun… Finding treasured should also be pretty easy and I will probably be one of the first to search underwater," Billy thought.

Billy couldn't care less about money, but finding deep-sea treasures still looked quite fun. While Billy was thinking about that, the air in the area began to change and he suddenly felt an ominous aura around… Billy raised his guard since it seemed that an enemy had approached. However, his guess was wrong… Instead of a single enemy, numerous shadows emerged from the ocean and they began to crawl on the land. That looked quite scary since Billy Couldn't see them clearly. However, it was impossible for him not to miss those silhouettes. They definitely didn't belong to humans, besides, humans wouldn't leave the dark ocean at night. They are some sort of Aquatic worms since they are long, but not tall… They were also pretty large. In any case, they were heading in a straight line toward Billy and the settlement that he made with his magic. He did the right thing in making a single settlement for both villages since it would be easier to defend. The only issue was the fact that many of them would have the chance to attack him if he makes some mistake...

"I suppose earth magic will do," Billy thought and then made some Earth spikes emerge and pierce the monsters in the middle.

You obtained 250 experience points.

The skill Earth Manipulation obtained 125 experience points.

You obtained 250 experience points.

The skill Earth Manipulation obtained 125 experience points.

…

Billy didn't even get surprised… Those creatures were either dungeon monsters or summoned creatures. Considering that their bodies didn't turn into dust after being killed, Billy confirmed that it was the first option… To think that a dungeon would appear at such a time and then would break causing that tremor. Maybe the dungeon had been there for a while and the tremor was caused by the break… Either way, Billy had to kill all the monsters. It was a pity that he would have to turn that area into something that resembled a battlefield... even though it had never seen anything like that in perhaps centuries.

Although Billy wasn't slow by any means when it comes to making the spikes emerge, some of the worms still managed to get close enough to attack. One of them almost hit Billy, but he dodged the water Cannon at the last second… Unfortunately, it hit a tree behind him and knocked it down, alerting the villagers behind Billy. He didn't want panic to spread since it was going to make his work harder if the monsters began to start to spread, but...

"That is a pretty decent power coming from a spell for that kind of enemy… Any ordinary people won't resist if they get hit by these," Billy thought.

Billy used Earth magic to keep things quiet, but since the villagers noticed the attack, he didn't have to do that anymore… In the end, Billy fired one of the spears he made using Mana Constructs and made it spin while it was moving around insanely fast. The worms tried to attack, but they weren't fast enough…

You obtained 250 experience points.

The skill Mana Constructs obtained 125 experience points.

You obtained 250 experience points.

The skill Mana Constructs obtained 125 experience points.

…

Billy quickly finished off the monsters since not a large amount of them came out from the sea… only around two hundred. It was a low number for a dungeon break, but it was more than enough to destroy two fishermen's village and their inhabitants. Besides, Billy knew that the places where his friends were guarding were also being attacked. In any case, four other attacks happened over the night, but only after sunrise the people of the villages could see what had happened. Billy had destroyed more than one thousand of those monsters and the entire area between the settlement and the village was now filled with corpses and the bodily fluids of those monsters.

"Those creatures truly look like worms…" Billy thought.

They had blue bodies, many small legs, and no eyes, their mouths also looked quite gross… they were pretty similar to earthworms that Billy saw in the desert where the elementalists lived before the war. Regardless, even during the day they kept coming at regular intervals, they were dead set in killing all of those they could sense nearby. Billy didn't recall if the golems of the titans always moved and could sense their targets like that, but it was hard to make a comparison… In any case, Billy had to kill all of them until some reinforcements come.