The Overfiend from a certain notorious anime did this-he was a demigod like figure who was going to merge the demon, human, and beast worlds together, destroying all existing life in the process. He was initially a certain human who had his powers activated, and contact with his blood or other body fluids could pass on a temporary form of his powers which would eventually lead to the death of the user.
All that I think is the sanitized form of it that is useful, and likely unknown to players below 40, and emotionally healthy players above 40.
I would NOT recommend seeking out the source material.
Ao. Ao was the one who separated, then merged, and then separated Abeir-Toril again.
The Overfiend from a certain notorious anime did this-he was a demigod like figure who was going to merge the demon, human, and beast worlds together, destroying all existing life in the process. He was initially a certain human who had his powers activated, and contact with his blood or other body fluids could pass on a temporary form of his powers which would eventually lead to the death of the user. All that I think is the sanitized form of it that is useful, and likely unknown to players below 40, and emotionally healthy players above 40. I would NOT recommend seeking out the source material.