One possible plot could be that Beast Boy sacrifices himself to save his friends from a powerful enemy. Maybe he uses his unique shape - shifting abilities in a way that drains all his energy, leading to his death.
Another plot could involve a disease or a curse that specifically targets his meta - human nature. As he tries to fight it off, he gradually weakens until finally, he succumbs to it, leaving his friends and the Teen Titans mourning his loss.
One possible plot could be that Alderheart succumbs to an illness that has been plaguing the Clan. His friends and family are left to mourn his loss and deal with the void he leaves behind in the Clan's medicine den.
A possible plot in a 'death of naruto fanfic' is that Naruto is killed in a political conspiracy within the ninja world. This could lead to a war between different ninja clans as they try to figure out who is responsible. Or perhaps Naruto's death is the result of a time - traveling enemy who changes the past in a way that Naruto no longer exists, and the story could be about his friends trying to reverse this change.
In the 'beast boy dominates raven fanfic', it could be that Beast Boy dominates in the emotional aspect. He might be the one to break through Raven's emotional barriers, being more in touch with his own feelings and using that to help Raven open up. This could involve him sharing his own experiences of loss or self - discovery, which in turn makes Raven more vulnerable and allows for a deeper connection between them.
One possible plot could be that Hermione fakes her death to go undercover and spy on the Death Eaters. She might have discovered a crucial piece of information that can only be obtained by infiltrating their ranks secretly, so she stages her death to avoid suspicion.
Perhaps in the fanfic, Voldemort has found a way to nullify Harry's magic for a short time. Without his magic, Harry is just a normal boy and Voldemort takes this opportunity to beat him to death. It could also be that Voldemort has an unexpected accomplice who helps him corner Harry, leading to Harry's demise.
Maybe Spyro Oculus is cursed and has to find a way to break the curse. This could involve seeking out ancient magic or powerful artifacts. Along the journey, it meets different characters who either help or hinder it.
One possible plot could be that Asta sacrifices himself to save the Clover Kingdom from a powerful, ancient evil. He uses up all his anti - magic power in one final, epic battle, and his body just gives out. Another could be that he's poisoned by a new, unknown enemy who targets him specifically because of his unique power. This would lead to a slow and painful death for Asta, with his friends desperately trying to find a cure.
Trigon could also be the main antagonist. Given his immense power and his connection to Raven, he could target Beast Boy as a way to get to Raven or simply to cause chaos among the Teen Titans. His demonic powers could be too much for Beast Boy to handle, ultimately resulting in Beast Boy's death.
One interesting plot could be baby Beast Boy's first encounter with other Titans as a baby. Maybe he accidentally turns into different animals and causes chaos in the Titans' tower in a really cute way.
Another plot could involve Beast Boy getting lost in an alternate dimension in the fanfiction. He has to find his way back home while encountering strange creatures and new versions of his friends. This would test his survival skills and his loyalty to his original team as he might be tempted by the different relationships he forms in this new dimension.