What if tanjiro got the carnage symbiote?

Demonic duel

Carnage electrocutes the dragon as it steps back in pain.Carnage manifests tendrils that grab his twin blades as he also manifests a fan. Carnage takes a deep breath and empowers himself.
Carnage:Darkness breathing,first form,Riot!
Carnage swings the fan down at full force, creating a force that hits the dragon head on, but the dragon pushes through.Carnage runs at the dragon at swings his twin blades with his tendrils and cuts up the dragons face,also sending it back a bit.Carnage grips his spear with two hands as he thrusts it up and down the dragons chest.
Grendel:GRAAAGH!
The dragon raises its wings as its hands shape shift into massive claws.
Grendel:GUAAAAAAAAAAGH!
Carnage:RAAAAAAAAAAAAH!
Muzan looks over to the two symbiotes,but instantly looks back to see Genya in his face,he now spoke in a vicious,bloodthirsty tone.
Genya:Where the hell are ya looking?!
Genya throws a punch and actually hits Muzan, surprising the king of demons.Muzan unleashes more whips,but Genya slashes through them and makes his way to Muzan,but Muzan reacts quickly and punches Genya in the stomach,lifting Genya off of the floor with his fist.But to muzan's surprise,Genya reaches in time and caught muzan's fist,but the force was strong enough to still hurt Genya.Genya swings his legs up in the air to wind up,he then swings the legs forward at full force,kicking Muzan right in the chest and sending him back.
Muzan and Genya rush at each other as Grendel and carnage form wings and take flight into the air.Carnage unleashes a sound blast at full force,greatly hurting the monster.
The dragon pushes through the pain and flies at carnage.Carnage preps his weapons again and charges at Grendel.Grendel opens his massive jaws for a biting attack,but carnage flies above his head and shoves his spear into the dragon's snout.
Grendel:GIAAAH!
Carnage shocks the dragon through the spear, weakening it even further.Carnage swings the blades and sends Grendel back through the air. Grendel angrily charges full speed at carnage but misses.Grendel runs straight through a mountain and turns around.Grednel charge ata carnage again,but that was exactly what he wanted.Carnage swings his fan at full force and hits Grendel right in his face,Grendel is sent flying back as carnage generates demonic wood from his body,the wood forms into many dragon heads that chomp down onto Grendel's body.Grendel struggles as carnage take s deep breath,the wooden dragon's fangs begins to spark as well.Carnage releases a gargantuan blast of sound as the wooden dragons shock Grendel at the same time.
Grendel:GUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH!
Grendel's body is broken down and fried as he closely falls down to the ground.The dragon falls as Muzan and Genya behold the site.Parts of Grendel's body was melted and burnt as the dragon sluggishly struggles to get up.
Muzan:No!Dammit!It's supposed to be stronger than that!
As muzan is distracted,genya leaps at him and kicks him in the head,breaking his neck and sending him into a rock.
Muzan:You pest!JUST DIE ALREADY!
Muzan throws a punch at full force,but so does Genya.The two clash as Genya smiles, confusing Muzan.
Genya:You don't get it,do you?I'm as strong as you now!I have strong jaws and a strong digestive system,so when I eat a demon,I get the traits of one!Not only that,but I have this!
Genya swings his swords and bits muzan's throat,cutting it open as muzan leaps back and is about to regenerate,but Genya pursues and continues to hack and slash at muzan's throat.
Muzan:Damn you!
Muzan throws his arms up to block,but Genya continues to slash at cuts muzan's arms up until he kicks Muzan away.Genya takes a deep breath as he begins chanting a prayer.Muzan stands up and regenerates,he looks at Genya and is confused.
Muzan:What are you-
Muzan is instantly shut up as carnage comes out of nowhere with an electric punch,burning and sending Muzan flying.
Muzan:GAHH!You...YOU PESTS!
Muzan releases a roar and generates a force. Genya finishes his prayer and rushes at Muzan, faster and stronger than even before.Genya slashes as his blade actually goes into muzan's neck.
Muzan:NOOOOOOOOO!
Muzan suddenly showcases a new strength and generates a shockwave that sends carnage and genya flying.Muzan heavily pants as he senses more people approaching,suddenly,a group of people land around him.Those people-