After Ten Millennia in Hell - Vol. 1 Ch. 54

[MangaDex]

 

[PLaci1982]

WHAT ARE THEY TRYING TO SUMMON?
A DEMON.

My instincts tell me, that the cult will succeed, and they end up summoning:

Spoiler: My theory.

Lilith, the queen of succubi, with the tentacles, from the early chapters, to the MC's dismay.

Spoiler: Image reference from Ch. 2

Imagine the shock of the MC, followed by the shock of the cult!

 

[Manhwaf]

My instincts tell me, that the cult will succeed, and they end up summoning:

Spoiler: My theory.

Lilith, the queen of succubi, with the tentacles, from the early chapters, to the MC's dismay.

Spoiler: Image reference from Ch. 2

Imagine the shock of the MC, followed by the shock of the cult!

Then the MC will kill it with style.