When a God of Destruction Was Reincarnated in Tensura:

A day that began with tense preparation turned into a nightmare as hundreds of swirling, chaotic portals opened simultaneously across the cardinal world. From each portal emerged Artemis's minions, beings forged from pure chaos and destruction. The skies darkened wherever they appeared, lightning crackling in unnatural patterns as the air grew thick with malice. The ground quaked violently, and fissures erupted, spewing black smoke and flames as the world struggled to handle the presence of such destructive forces.

In every corner of the cardinal world, chaos reigned as Artemis's forces began their assault.

Cities and Villages: Entire towns were reduced to rubble within moments as the Ruinborn Colossi, towering behemoths of chaos, rampaged through buildings, their massive fists crushing everything in their path. Their roars echoed like thunder, and with every step, the ground splintered beneath them.

Battlefields: The Umbral Stalkers, shadowy assassins wreathed in dark energy, darted between soldiers and civilians alike, striking with precision and vanishing before they could be countered. Their attacks were silent but lethal, leaving no time for retaliation.

Strongholds and Fortresses: The Dread Sovereigns, Artemis's elite generals, targeted fortified locations. Each Sovereign commanded legions of minions and wielded powers that could bend the laws of nature. Their abilities—ranging from massive energy blasts to summoning storms of chaos—laid waste to even the most secure defenses.

The invasion's scale was too massive for any single nation to handle. Every country in the cardinal world rallied their armies, setting aside past grievances to unite against the common threat.

Dwargon

King Gazel Dwargo led the dwarven army, their shields and weapons glowing with runic enchantments. The dwarves formed unbreakable phalanxes, holding back waves of Ruinborn Colossi. Gazel himself stood at the frontlines, his sword blazing with divine energy as he smashed enemy after enemy.

"We've held off demons before," Gazel roared. "These creatures are no different! Hold the line!"

Sarion

The elves of Sarion unleashed their full magical arsenal. Their archers rained down enchanted arrows that exploded on impact, while their mages summoned elemental storms to devastate the invaders. Emperor Elmesia directed her forces with precision, his calm demeanor inspiring his people.

Falmuth and Blumund

The smaller nations, though lacking in strength compared to their allies, contributed bravely. Falmuth's reformed army, led by Youm, fought valiantly, using guerrilla tactics to strike at the invaders' flanks. Blumund deployed its adventurers and mercenaries, their resourcefulness proving invaluable in slowing down the enemy's advance.

The Eastern Empire

The Eastern Empire's forces, led by Emperor Rudra and Velgrynd, the Scorch Dragon, were a pivotal part of the defense. Rudra stood at the heart of his vast army, his calm, calculating presence a beacon of hope for his soldiers. His Unlimited Imprisonment skill created massive zones where Artemis's minions were slowed and weakened, allowing his forces to strike decisively.

Velgrynd was a force of nature on the battlefield, her fiery breath incinerating legions of minions in mere moments. She soared across the skies, unleashing waves of heat that melted the strongest of the Ruinborn Colossi.

"This world belongs to us," Velgrynd roared, her voice echoing across the battlefield. "And I will not let anyone take it!"

Tempest remained a crucial stronghold in the defense. Rimuru had already positioned his generals to protect the borders and lead coordinated counterattacks.

Benimaru: Commanding the main army, Benimaru unleashed his Hellflare Barrage, incinerating countless minions with waves of black flames. His precise leadership ensured that Tempest's forces remained organized amidst the chaos.

Diablo: Always eager to impress Rimuru, Diablo appeared on multiple battlefields, teleporting between them with ease. His Flame of Ruin ability reduced entire legions to ash, while his charismatic presence kept morale high among the defenders.

Shion: Shion fought with her signature ferocity, wielding her massive sword with devastating efficiency. Her strikes sent shockwaves across the battlefield, and her relentless energy inspired the soldiers around her.

Zegion: Zegion stood like an unyielding wall, his Exoskeleton Shield absorbing enemy attacks effortlessly. He struck back with calculated precision, each attack devastatingly effective.

Veldora: The Storm Dragon unleashed his full might, his dragon's breath annihilating everything in its path. "Finally! A battle worth my time!" Veldora roared as he clashed with one of the Dread Sovereigns, the shockwaves of their battle shaking the land.

Guy Crimson: Guy froze entire battlefields with Azazel, Sovereign of the Eternal Abyss, halting the enemy's advance. His icy constructs served as both weapons and barriers, giving allied forces time to regroup.

Milim Nava: Milim's Vritra, Wrath Incarnate skill radiated raw destructive power. She flew into enemy lines, unleashing explosive punches and energy waves that obliterated entire armies. Laughing maniacally, she declared, "More! Bring me more enemies!"

Luminous Valentine: Luminous used Lilith, the Queen of Temptation to sow chaos among the invaders, turning weaker minions against each other. Her vampiric abilities drained the life force of her enemies, strengthening her soldiers.

Leon Cromwell: Leon's Solom, Bringer of Light and Judgement skill summoned celestial swords that rained down from the skies, striking with divine precision. His calm and collected demeanor made him a commanding presence on the battlefield.

Draguel: Draguel's Khaos, the Annihilator shook the earth with every strike. His seismic waves disrupted enemy formations, and his raw strength was unmatched in close combat.

Rimuru: At the heart of the chaos stood Rimuru, his ultimate skills Azathoth, Deus ex Machina, and Genesis Omega making him a terrifying force. With a wave of his hand, he altered the terrain, creating barriers and traps that hindered the invaders. His attacks were devastating, black holes swallowing enemies whole while beams of pure energy cut through their ranks.

Despite the initial devastation, the combined might of the cardinal world began to turn the tide. The armies fought with renewed vigor, their leaders inspiring them to push back against the overwhelming chaos.

Every battlefield became a testament to the cardinal world's determination. As the portals continued to pour out minions, the allied forces held strong, their unity and strength proving that they would not be easily defeated.

In the distance, Artemis observed through his dimensional rift, a twisted smile on his face. "So they resist. Good. Let them struggle... the real game has yet to begin."