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Why is my stupidest idea actually happening?

Okay, let's not question the almighty system for the moment.

The Cat I've had as a pet for four years suddenly began to glow red… and mutated a bit.

His entire physique became one or two centimeters bigger, his ears grew pointy and his claws larger, alongside his upper jaw fangs.

My cat really evolved.

The blood of the monsters was absorbed into his body and then his evolution finished…

Ding!

[You have tamed the [Black Cat: Level 1/10] Monster Pet!]

Oh?!

Well, the race didn't change its name but… I tamed him…

I guess I am not just a summoner but a tamer. I am filled with talents, I suppose.

I try to pet Cuco, and he lets me… It seems that things are fine, he hasn't gone rabid or something, but he obviously might feel strange.

"Oh, Master! It happened! See? I told you it would happen, fufu~!" said Kireina.

"Amazing, now you have tamed your cat… Well, will you tame other monsters now? Ah, we should let him level up with us for now," said Ervas.

Taming other monsters…

It seems that, unlike summons, monsters don't drain mana from me, but they can die permanently, unlike summons that remains with me forever and can be brought back with Mana.

I guess they both have their pros and cons, huh…

It would honestly be cool to tame the Bosses… But is there a limit?

I walk into my room with everyone and decide to check Cuco's Status.

…

[Name: [Cuco]

[Race: [Black Cat (Monster)]

[Monster Grade: [F-Grade]

[Element(s): [Darkness]

[Level: [01/10] magic

[Vitality: [40/40]

[Mana: [30/30]

[Strength: [30] [Magic: [20]

[Dexterity: [60]

[Skills]

[Dark Claws (F)]

[Shadow Walk (F)]

…

I think he's stronger than me when I started yesterday…

And he got two interesting Skills to boot.

[Dark Claws (F)]

Naturally wield the Dark Attribute, coating our claws with darkness and unleashing slashing attacks that calculate damage using both Strength and Magic.

[Shadow Walk (F)]

Merge with the Shadows and travel through them by short intervals of less than a meter.

…

They're quite interesting and simple, I believe he might make some good use out of them!

And if he obeys me now that I am his tamer, things might get better.

But now I wonder the taming limit, how many tamed monsters can I have? And can I store them somewhere?

Ding!

[Current Limit of Tamed Monster Pets: 1/10]

[You can gain additional slots by growing stronger]

[Tamed Monster Pets can be stored in the Summon Barracks]

Well, that resolves everything… I guess the System can help when you least expect it.

Having that out of the way, we continued to explore Dungeons, going into the Gold Dungeon.

I planned something as we killed monsters.

What if I tame the Bosses… multiple times?

How about 3 Venomous Viper Bosses, or 3 Queen bees?

Hmm… But can it work?

And what if I find a better monster later? Should I simply discard one? That would be cruel after growing attached to them… Unless I could fuse them or something weird, it is better to tame one for each and see where it goes.

Ding!

[Monsters can be fused by using Gold and Hero Feathers, similarly, to repeated Heroes, however, Monsters have fewer limitations, although fusions can only be performed in between similar Grade Monsters]

[There is a limit of 3 Monsters that you can tame per Race]

The System once more answers my questions with great swiftness, as it makes me think some more…

So I can fuse monsters?! That's some next-level Pokémon… Wait, no, this is Digimon at this point.

Wait… this means I could turn Cuco into a giant chimera… I don't know how to feel about that.

For now, I decided to tame three normal Venomous Vipers with the help of everyone, and then we did our best to tame the Boss, which was incredibly difficult. We had to smack him but make sure to not kill him and all…

In the end, Kireina's Illusion Magic came into handy, and she used it to brainwash the weakened boss. With that, I managed to tame it at last…

The Boss and the Normal Venomous Viper count as different species it seems, so I can tame the Boss two more times, which we did in the next runs, although we ended quite exhausted.

I also tamed 3 Gold Mouses, the monsters that drop a lot of Gold in the Gold Dungeon.

With that… This was what I had…

[Venomous Viper (F-Grade): Level 1/10] x3

[Venomous Viper BOSS (F-Grade): Level 1/10] x3

[Gold Mouse (F-Grade): Level 1/10] x3

And Cuco who became Level 4 after the dungeon runs, he's growing stronger!

And he might do even more now!

But hold on, how do I do this? Do I fuse the vipers with the Boss ones? What about the Mouse? I don't have any more slots so…

I inspect what can come out of a small viper and a big viper, and the result is the same big viper, but it has a slightly different-colored eye… The System shows up the possible result of a monster fusion rather easily, so I can take a peek at my options.

Well, I plan to leave the bosses as they are and fuse away from the smaller ones, I want one of each Boss if possible, plus Cuco, so the rest has to be fused away.

Fusing the Vipers and Mouse didn't give me E-Grade Monsters, so I could fuse them back to the Viper Boss, which still doesn't net an E-Grade Monster, so I could fuse them together.

I try to see about a fusion for Cuco, and see that the possible result with the mouse is a golden-colored cat, with the viper is something resembling a cat with a purple-scaled tail, and it seems that it could secret poison.

And about the mind, I can select which one ends dominant… Huh.

The max amount of fusions is three at the same time, so let's do it.

Okay, I figured out what to do…

It only asks for some gold, so I can handle it.

I feel a little bad for Cuco… but this will help him survive.

This is what I did:

[Gold Mouse (F-Grade)] + [Gold Mouse (F-Grade)] + [Gold Mouse (F-Grade)] = [Giant Gold Mouse (F-Grade)]

[Venomous Viper (F-Grade)] + [Venomous Viper (F-Grade)] + [Venomous Viper BOSS (F-Grade)] = [Red-Eyed Venomous Viper BOSS (F-Grade)]

[Giant Gold Mouse (F-Grade)] + [Venomous Viper (F-Grade)] + [Red-Eyed Venomous Viper BOSS (F-Grade)] = [Red-Eyed Golden Scaled Venomous Viper BOSS (E-Grade)]

[Venomous Viper BOSS (F-Grade)] + [Venomous Viper BOSS (F-Grade)] + [Black Cat (F-Grade)] = [Snake-Tailed Venomous Black Cat (E-Grade)]

[You exchanged 4000 Gold!]

And done.

This way, both end at E-Grade…

And I see Cuco's new form, he seems calmer than ever, in fact.

His scaled tail waved around carefreely and his claws now have some poison on them… But he seems completely okay with it anyways.

I petted him and his hair was now even silkier than before, he began to meow cutely afterward. I suppose he's still the same cat.

And the Viper… I named it Apophis. It is a silent and observant type, so there isn't much character development with this guy.

Now that I have tried fusions, the amount of gold it uses is okay, but I will most likely not go around wasting it in every new monster I find unless they're particularly stronger than I could fuse them over the already tamed beasts I have.

We continued our runs of Dungeons, exploring the EXP Dungeon afterward…

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