"Sorry, ya little mobster," Edgar- wait, I mean God smirks, "but Mafiatale is dead."

God FIGHTs, using magic, like his creations can. Mafiatale Chara is obliterated.

"As for you," God continues, "I have a gift for you Underfell Chara."

God writes something, and a soul appears in his hands.

"This," he smiles, "is your soul. Kill Red, and it's yours."

"Sounds good to me," Chara replies.

"Great," God smiles, "now, if you fail, that's fine. To be honest, I have plans for Red. Now, let's go."

God writes something, sending himself and Chara to Red's blank universe. Red, a fan character, one of the first, is on her knees, crying.

"You're back," she sighs, "to kill me again. They've forgotten me. They made their little AU creator with his damn brush, and left me in this void. Visiting to kill me every now and again. No one bothered to save me."

"Oh," God smirks, "I'm not gonna kill you. I'm here to test you. Survive against my little friend for three turns, and I will give you a home."

Red looks up. "Really?" She asks, "its been so long. So long, in this forgotten abyss..."

"I hate them too," God continues, "they killed my brother."

"I'm sorry."

"It's fine. It's not like it was canon. Now, let's begin the test. Chara!"

Chara starts a FIGHT.

Red takes a defensive stance. Chara FIGHTs, dealing massive damage. Red stays standing.

"I won't fall now," she growls, "this is my second chance."

Red eats a Corpse of a Frisk. Disgusting. Is this how she survived after you forgot her? Ah well, it heals them.

Chara FIGHTs once more.

"I've lost count of how many I've killed," Red continues, "how many have killed me."

Red eats another corpse. This is just plain messed up.

Chara FIGHTs one last time.

"But now," Red laughs, "I'm coming back. I've watched the AUs, they spend so much time with that DAMN SKELETON! THEY LEFT ME HERE! I WILL KILL EVERY SANS! THEN, THEY'LL NEVER FORGET ME!"

"That's three," God smiles, realizing that they have someone else who can destroy Mafiatale, "Chara, your soul, and you now go home. With the weight of your sins. As to you Red, you wanna kill Sanses? Great. I do too. Go kill Mafiatale Sans for me, and while you're at it, the rest of the AU. I'll make it easy."

God hands Red Dragonfang, a powerful weapon from his world. Red equips it.

Dragonfang. 9999 atk. The weapon of the Unwinged Angel.

"Now," God writes as he speaks, "you two have fun! Red, I'll pick you up when you're done."

Edgar sends the two to where they need to be.

Underfell Chara immediately collapses under the weight of  their sins. What have they done? They just let God destroy an entire universe, and tried to destroy their own. Maybe you should comfort them?