Underworld Royal Palace, Hall of the Dark Star.

Inside the throne room there is a black long haired man who is wearing crimson mix with black samurai armor.

This is the All Reaper the ruler of this underworld and he is meditating only to open his eyes which is crimson red.

All Reaper: "The time have come for realities to merge" he said standing up then everything around him begin to shake.

All Reaper: "Al-Omni Merge" he said then a bright crimson light come from him.

All across realities multiple worlds merge with Real Life Earth.

It been seven days and many places was conquer by many factions but many of the civilians were kidnapped by the All Reaper army and those same civilians become slaves to build castles and fortresses for the All Reaper.

However in New York City where massive trees took over many buildings.

There is a young brown spikey haired man wearing a black tank top and jeans this is Anon.

He been surviving by staying in the shadows however he ain't alone as with him is the former Queen of the dark elves Olga then there Ingrid former member of Nomad and resident of Dark World.

Apparently their forces were slaughter by the All Reaper army yet they manage to escape.

Currently Anon, Olga and Ingrid is hiding in a building watching as many demons, grimm, undead, heartless, and Venoms is kidnapping many civilians.

Leading this army is Frieza and a white haired with latex leather woman with wings called Allani who is looking at the army.

Allani: "It been seven days since the merge and so far one third of the world is conquer by us. Pathetic" she said.

Frieza: "Indeed but thankfully the All Reaper already dealt with the strongest heroes like those monkeys sadly they escape" he said.

Allani: "Perhaps however it seems that they are still a pest for the great All Reaper" she said then see some tanks which she unleash a dark beam that turn the tanks into dust while the soldiers are immediately captured.

Frieza: "I still don't see the point in enslavement but if it get results I don't care" he said then shoot a beam at a building where Anon pushed Olga and Ingrid out of the way.

Allani: "It seems that we got three guests" she said which Olga and Ingrid glare as they prepared to attack only for Anon to stand in their way.

Anon: "You two are still recovering! Get out of here!" He said which Olga and Ingrid look worried.

Ingrid: "No can do! You're just normal!" She said.

Olga: "Yes besides we can fight!" She said which Anon was about to speak only to cough out blood as Allani shoot his stomach.

Both: "Anon!" Ingrid and Olga shout then rush to him only for Venoms to get in their way.

Allani: "Being a hero would leave to pain and suffering so why don't you die" she said as Anon lay on the ground with blood coming out of the hole as heartless surround him.

Only for a bright light to blind everyone but once everyone sight returned it reveal that Anon, Olga and Ingrid have vanish.

Frieza: "It seems that the Jump Force Warriors have intervene" he said which Allani glare.

Allani: "Yes but they will regret it" she said.

Crossovers:
Naruto
One Piece
Dragon Ball
Bleach
Black Clover
Yu-Gi-Oh
Dragon Quest
God Of War 2018
Eldren Ring
Senran
Kuroinu
taimanin
Street Fighter
Tekken
Kingdom hearts
Rwby
Jojo bizarre adventure
Saint Seiya
Final fantasy
Warriors Orochi
Inuyasha
Hunter x Hunter
My hero academia
Overwatch
Berserk
Fairy Tail

An: there gonna be more