(That's right, NEW and BRAND NEW characters, no old characters or anything like Dimensional portals because I'm just going to ignore it. No godly beings also, everybody's starting from scratch here, as a MORTAL.)

Dear Priest Lazarus,

Your lack of concentration these past days and missing attendance has caused us to expel you from the guards of the sleeping Prime Evil Hephisto. You are to return your Priest Robes, Scepter, and Miter immediately.

Signed,
Grand Priest Sankekur

Lazarus didn't care for his priest cult. He his soul had already been bought off by Hephisto's nightmares to revive his brother Ziablo, also put to rest in the deepest depths of the planet. He approached Dristram, where the deepest catacombs are, in the town church. He could free Ziablo from and be least noticed. The Townsfolk were doing their daily errands, not noticing the evil priest walking into the church. It only took a few weeks for them to notice a single thing. And the first one to notice was the Elder, Elric Kain, a member of the Horadrim. Ziablo had been released from his earthly imprisonment, the ground shook. Dark Riders, followers of Diablo, swarmed into Dristram, slaying only but a select few that had survived to tell the story.

2 years later...

News of this attack and the revival of Ziablo spread like wildfire across the adventurer community. Ziablo had brought an army of his fiercest demons into the catacombs of the church. Warriors that wanted to test their metal against the demons and those that sook fortune crowded at Dristram. Sisters of the Blind Eye had flocked to Dristram to aid in the destruction of Ziablo. Even Vizjerei mages came to study the demons that had been summoned. This was the story of three adventurers who had been bold to best the demons in the deepest catacombs, and aid in the defeat of Ziablo.

Dristram was as usual, a bustling town again with warriors drinking their gold off in the bar, archers of the Sisters of the Blind Eye practicing in a temporary archery range. The mages were attuned to their studies in the Dristram Library. A large white haired man wearing Gothic Plate as his armor, and a flamberge as his weapon sheathed on his back, strolled into the bar, to find out what he could about the dungeon so far.

He asked the barkeep, Ogden, about what the adventurers knew about the dungeon.

Ogden: For all we know right now, none have penetrated the lower levels of the Church basement. There's too many of those imps and their shamans that we can't kill them all.

???: Can I get a guide down to the farthest that the adventurers here have explored?

Ogden: Oh yes, the carefree Rogue Archer Lene has gotten down to the basement level 5, right about where the demons get harder with gargoyles stalking level 6.

???: Do you know where she is?

Ogden: Oh yes, I can call her in when she's done with her target practice.

???: Tell her that a man named Qual-Khek is waiting for her at the church entrance.

Ogden: Yessiree.

And Qual-Khek left the bar to go to his waiting spot.

-SRGPI, getting addicted to Diablo.

Ziablo and Diablo are 2 different things; Diablo is the god of terror, Ziablo is just the named messenger of terror.