Naruto Card King - Chapter 87

“My name is Zeon, and my weapon is the entire desert.”

The Earth underwent terraforming. As a result, the oceans evaporated, and the land transformed into sand.

On the desertified Earth, Zeon became the sole Sand Mage.

The world named him the Sand Ghost.

In a world where everyone is undergoing their profession's transition, I've surprisingly awakened to two professions.Moreover, I've also awakened a defiance lifestyle profession.Preserve high-quality items? I'll just synthesize them.Preserve high-quality skills? I'll synthesize those as well.Preserve high-level pets? I'll keep synthesizing. Wait, why is this beast-girl so large after the synthesis?Let's start by synthesizing three “Skeleton Summonings.”Synthesize into—The “Undead Army.”Now, let's synthesize three Dark Wands.Synthesize into—The “Death's Scepter.”In the grand interspecies gaming contest of the universe, can we, humans of the Solar System and Earth, ascend to an even broader stage?......

A question I often ask myself, is the human desire for self-destruction never going away?

Travel through the endless apocalypse world, and find the answer behind every kind of demise!

- Description from novelbuddy

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.