I started attacking all goblins with magic.

"Explosion." First I threw a blast in the middle of the goblin group, because the blast area was large so I could kill a lot of goblins.

After I used magic all the goblins realized where I was and started running towards me.

King Goblin was still standing in the same place, he was just giving orders to the other goblins.

As all the goblins were coming towards me I took the sword in my hand.

I started to inject mana into the sword blade.

Soon after that the blade began to glow bright red, whenever I see it I find it wonderful.

The goblins came one after another, but they are very weak.

Whenever a goblin got close enough I just swung the sword and broke the goblin in half.

It was a wonderful and satisfying scene cutting so many goblins together.

'Really, I haven't tested combined spells yet.' In this world there were spells that worked when you mixed 2 elements, but I never used them before.

Maybe I forgot? Or am I really dumb?

Well, whatever, now I'll use to kill all these goblins at once.

##########

I was thinking of the best magic to use right now, so I decided to use a lightning storm.

Because the lightning storm I think could strike a larger area so it's a good choice.

In the next instant I joined the mana and the elements Wind and Water.

When I finished doing this, a few small rays of light started to come out of my hand, I think that means it's working.

"Lightning Storm" The moment I said the spell, a huge black cloud appeared above the group of goblins.

After the cloud was formed, several lightning bolts began to fall from the cloud over the goblins, I could only see several dying goblins totally burned by the lightning force, it was an amazing scene.

Even using such powerful magic some goblins were still alive, so I just ran after them and finished them with my sword.

Another that stayed alive was King Goblin.

He had been struck by lightning so he was injured, but still he was still standing and wanted to keep fighting.

#########

I ran toward King Goblin with the sword in my hand.

I jumped toward his head and tried to hit him.

But King Goblin was hiding his weapon, he took a huge piece of wood that he was hiding behind his back and slammed it toward me.

'Damn' I realized I wasn't going to have time, so I put the sword in front to not get a direct attack.

As soon as King Goblin hit me I flew back and fell to the ground.

"Damn, I made a very stupid mistake" I had fought many times before, I don't know how I was able to make such a stupid mistake.

"Let's try another combined magic on this Goblin King." I'm sure King Goblin couldn't survive another powerful magic, so let's kill him quickly.

I wanted to kill him faster because I wanted to finish this mission right away to talk to Mary.

'Well, Mary is still at school, so I don't have to hurry.' But I still want to keep testing these spells.

I couldn't use a fire magic in the middle of the woods so I was thinking of using one with water or earth.

'I think I already know.' After some thought I decided which magic to use now to finish this goblin king with an attack.

"Mud Tsunami" I decided to use a magic that used Water and Earth magic.

In the next instant, a huge wave of mud appeared right in front of me, and then the wave started to toward King Goblin at incredible speed.

King Goblin didn't even have a chance to react when he realized the wave was already upon him.

The wave totally swallowed King Goblin, I don't even know where King Goblin was now, because he was totally swallowed by the wave.

You have leveled up.

"It's finally dead." I was happy to have leveled up, and i started taking each of the goblins and tearing off their ears.

As evidence of subjugation I would have to carry a pair of ears for each goblin, so I think I will finish catching all ears only when it gets dark, as there are many goblins.