Mammon suddenly woke up to Lucifer shaking his shoulder and yelling his name.

He then suddenly saw everyone and him in the thrown room chain to the floor with demon guards guarding the exits.

Mammon : I.... what happened?"

Asmo : we all kinda got knocked out and taken..... and Barbatos is dead"

Mammon :....."

Mammon couldn't believe that. But on another note he couldn't believe what he just dreamt about if it was a dream or memory.

It felt like a memory one he forgotten. But it couldn't be true. why remember now?.

Anyway he ignored that and realize he needed to find a way to get everyone out of here and knew one way.

Mammon : listen I have a plan to get us out but you need to trust me alright Lucifer?"

Lucifer : whatever it is don't be s,-

Somehow Mammon was able to break the chains and said before standing up sounding surprised.

Mammon : woah ..... honestly didn't think that was going to work...."

Lucifer : Mammon don't be stupid!"

Mammon : it will be fine"

Mammon then sneaked away staying out of sight from the guards.

Then suddenly he just sprinted behind some guard taking them a piller and suddenly the guard collapsed to the ground and Mammon then took his weapon and started fighting the other guards he altered.

Few seconds later the guards were down and Mammon started walking towards everyone.

Lucifer : that was your plan!?"

Mammon : it work right?"

Lucifer : .....i-!?

Asmo : MAMMON LOOK OUT!"

Before he could react Diavolo's father grabbed him by the neck and threw him against the wall and he hit the ground hard spitting up blood.

Diavolo's Father : you are such a stupid thing"

Lucifer : DON'T YOU DARE HURT HIM!"

Diavolo's Father: oh? Like you can stop me?".

He then walked over to Mammon who tried to get up. And picked up a spear and stabbed it through his shoulder. It going straight through and getting stuck to the wall.

Diavolo's Father : considering he liked you. I'll start by killing you first."

Diavolo's Father then pulled out the spear and was about to stab him until.

Suddenly the sky outside turned to this greenish color and it started raining and thundering like crazy and everyone could hear something big walking towards the thrown room doors.

Each step shaking the floor and Diavolo's Father immediately started backing up knowing who was coming.

Then suddenly he broke the doors down by kicking it and walked in and nobody could believe who it was.

Barbatos walked in looking completely different and taller than anyone in the room and looking like a king.

And Mammon realized what he saw was real and he looked just as horrifying as he once did.

King Barbatos : surprised false King?"

Diavolo's Father : how the hell are you alive!?"

King Barbatos : what made you think you could kill me? I'm a god. the true ruler of Devildom.
The guardian of eternity space and time.

If I die once I can just become reborn again and again. Because I cannot truly be killed I exist beyond this physical form. 

Unlike you it's all you have "

King Barbatos hands then glowed and suddenly Diavolo's father was force to his knees by this glowing energy that was surrounding his neck wrists and ankles and he was unable to move.

King Barbatos : you took something precious away from me....do you remember what?"

Diavolo's Father : ....."

King Barbatos : ANSWER NOW!"

Diavolo's Father : no!"

Hearing this only made King Barbatos angrier and everyone could sense this dark aura and knew and could see he had no intention of letting him live.

King Barbatos : .......how could you forget.....I REMEMBER EVERYTHING! I SEE EVERYTHING.....YOU WILL REMEMBER EXACTLY WHAT YOU DID! EVERYONE WILL SEE IT!"

Suddenly King Barbatos made this portal looking mirror appear made up by this glowing energy and started to show what happened that day.

..................................................................

King Barbatos was sitting in the middle of this big room in the castle. Hovering off the ground a bit with his eyes closed and hands together like he was mediating. The room was also glowing with his magic and seemed full of life and so bright and peaceful.

But suddenly it was interrupted by a little girl who ran into the room after her bouncy ball.

He then got down standing up and walked over to the ball. grabbing it then kneeling down and handling it to her.

King Barbatos : you should be sleeping my dear"

Little Girl : but I'm tired!?"

King Barbatos : I know but it's important to rest. Now go back to bed"

Little Girl : will you read me a bedtime story?"

He then smiled and said patting her head.

King Barbatos : of course I will"

The Little Girl then laughed happily before running off with her ball.

King Barbatos then started to get back to work after she left but it only lasted a few seconds before.

Suddenly he heard a loud explosion that shook the castle and making some rubble fall and immediately he ran off to go get his daughter worried something something.

King Barbatos : ANGEL!?"

as he ran into a hallway.  The hallway leading to her room he suddenly froze in place as he saw it completely blocked off by rubble and saw her bouncy ball
Roll over to him covered in blood.

And as he picked it up. He looked over at the rubble and saw a arm sticking out surrounded by blood.

Pain and fear then set in and he quickly started to use his magic to attempt to redo time so he could save her. but his magic wasn't working.

And then out of a corridor a demon walked out who was Diavolo's Father.

King Barbatos : y....you did this....YOU DID THIS!!"

Diavolo's Father : there can be no survivors of you or your family if I am to take over"

King Barbatos : ....."

King Barbatos couldn't believe what was happening. His child was killed and he was going to be killed to.

By some demon who just wanted 
His kingdom.

he was angry and wanted to kill him but he was in state to fight so he decided to just run off.

As he was running off through the woods he didn't have time to process what had happened. He had to leave and not let the demon win.

But just as he thought he lost the demon.

The Demon suddenly appeared in front of him and grabbed him by the neck.

Diavolo's Father : the king  of Devildom and your running away?"

Somehow almost all of King Barbatos power was weakened to the point he couldn't do anything.

No matter how hard he tried he couldn't loosen the demon's grip around his neck.

Diavolo's Father : I'm sure it had to hurt seeing your child die. But at least you'll get to join her in death"

King Barbatos : ......I'll kill you.... don't think.....for a second you won......I will come back....."

Diavolo's Father : and when you do I'll kill you again."

And with that he stabbed King Barbatos in the chest with a sword killing him instantly.

And as Barbatos lay there lifeless on the ground he was still holding his daughter's favorite toy the bouncy ball.

..................................................................

After that mirror Portal vanished King Barbatos suddenly summoned up his daughter's toy that he was holding in his hands.

King Barbatos : .....all I have left of her is this.....of her sweet little smile.....I can't believe I forgot it....

But just like I said I will kill you for what you did......"