#I wasn't even looking for this I was just browsing an index for FR articles in Dragon magazines and found it

[y-rhywbeth2]

...I just found a guide on how a Bhaalspawn can become God of Murder in an old Dragon article! Disclaimer: You might need to kill Bhaal again first for this to work.

"First, [the Bhaalspawn] must bring about the death of a thousand innocents. It can do this through a variety of methods: unleashing a magical plague, using magic to destroy a city with an earthquake, awakening and then controlling an ancient dragon... the possibilities are endless. "Next, it must recover a piece of its father's mortal flesh; either from the body that lies within the Winding Water where Bhaal was killed during the Time of Troubles or else the body left in the Moonshae isles, where Bhaal's avatar was killed by King Tristran of the ffolk. "Finally, he must sit upon the Throne of the Gods and be judged by the overgod Ao. The Throne could be located in any number of inhospitable places: the Starpeaks in the High Forest, in the deepest regions of the Underdark, or somewhere on the Outer Planes." - Dragon #288

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Other fun stuff in there included the idea that Bhaal was very likely to direct his kids to fuck up Cyric's plans.

There was also a guide to the weird powers they will develop:

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Warning, having Bhaal as a father may cause you to exhibit two or more of the following side effects:

Addiction to homicide (Refusal to commit homicide will lead to your mind being eaten away until you turn into a ravening, feral animal.)

Your soul going to hell (well, Gehenna) when you're unconscious

Viscous black blood that attracts devils and demons like flies to honey

Poisonous blood! You can coat your weapons with it!

Turning into a divine murder monster

Getting so carried away with bloodlust you try to fight everything. Literally everything in reach, all at once.

Overwhelming homicidal rage when slightly inconvenienced

A steadily weakening sense of free will

Everybody around you immediately dislikes you because you give off Vibes.

A personality so bad it has charisma penalties

Nightmares so traumatic they actually impair your ability to function while awake

Detect evil spells will say you're evil and holy weapons and water will harm you. Even if you're not evil

Being fireproof, for some reason

Super strength

And more!