Behead

"Strength Amplification X5"

"Strength: 299.3 > 1496.4 Agility: 299.3 > 1496.4"

"Kagune"

"Dragonification"

"Electricity and Thunder Body"

Lou feels that overflowing strength coming from a bunch of buffs she used, the Dragonification ability suddenly changes, a layer of light blue scale appears in her arms and neck.

Not only that, the Electricity and Thunder Body suddenly become intense, he can see an electric spark coming from her weapon and her Kagune.

Lou then fully opens her Kagune wing and glides straight to the Great Whale, he holds his weapon and slashes it upward.

"Self Made Art: Dragon Claw"

A gigantic wind cutter created from the wind pressure and sword energy of Lou's weapon.

*Slash

Then it hit the Great Whale creating a huge wound to his belly, black blood splash everywhere while the Great Whale started to move around more vigorously.

"Self Made Art: Early Morning Summer Rain"

"Green Lotus Core Flame"

Lou covers his weapon with Green Lotus Core Flame and burns all the black blood that flows out from the Great Whale. He doesn't know if the black blood is dangerous so doing this can prevent danger from happening because of the blood.

He then flaps his Kagune to fly trying to the back of the Great Whale but flying using Kagune is hard.

Lou's Kagune can only glide not to fly so flapping his Kagune can only help him to float briefly.

After Successfully landed, Lou stabbed the Great Whale's back and dash to open a huge wound.

*ANG!!!

The Great Whale roars, of course, that whale can feel the damage that Lou is creating in his back. Then it starts to flip and twist to remove Lou.

But Lou is much more persistence than him, Lou use his other Kagune and do more damage,

Combining Ice and Flame elements the damage that the Great Whale recessive is tremendous, The Great Whale starts to bleed a lot, but not even a drop of blood comes out because Lou uses his Green Lotus Core Flame to burn the black blood.

While the Great Whale is trying to shake off Lou, Lou is creating a huge wound all over its body, then Lou arrives in the head part of the whale.

"Self Made Art: Giant Decapitator"

Lou swings his weapon using all his strength to behead the Whale, but he only successfully cuts ¼ of its head.

*HNNNGGG!!

The Great Whale angry roars and flips and starts to fall, Lou knows that this Whale is trying to smash him into the ground using his body weight.

"Self Made Art: Giant Decapitator"

"Self Made Art: Giant Decapitator"

"Self Made Art: Giant Decapitator"

Lou starts to hack faster, he almost uses pure speed to hack the head of the monster, but still, the falling speed still increases.

"Self Made Art: Execute!"

*PSST

A fountain of blood gushes out from the head of the Great Whale, while the head successfully removes it at last.

But still, Lou still has a problem, the Great Whale is still falling faster. Lou knows that he needs to escape now or he will squash this gigantic carcass.

"Phantom Step"

*BOOOM

Lou uses his skill to escape while the carcass smashes the side of the mountain creating a huge tremor all over the City D.

.....

Ding! You Complete Main Quest: Eliminate the Monster from Old Hell

Ding! You receive Summon Chance 2x

Ding! You receive Random Ability

Ding! You receive Special Ability: 'Party'

Ding! You receive Mysterious Gift 1x

.....

After seeing that his quest is done, Lou walks to the girls to bring them back, they need to leave this place before someone arrives.

"Lou-sama," Goemon, holding a bag of shining crystal appears.

"Lou-sama you forgot the loot," Goemon said.

"What loot?" Lou asked.

"That loot," Goemon points her loli finger to the gigantic carcass that starts to shine and disappear.

The Victorious and Undefeated Blue Whale left a huge blazing orange core, it seems that Kanabe really has loot even as an undead.

Lou hurry to take it, he feels that this core is precious, maybe they can use it later, after that he takes all the girls and runs back to their house.

"So what are you doing here?" Lou asked Haruna who follow them.

"Of course to sleep! Are you an idiot?" Haruna said while carrying Megumin to her room.

"..." Lou