He was the one who inadvertently gave Light Yagami the Death Note and instigated his killing spree. He would later become the main antagonist of the one shot special chapter, set after the events of the original series. The manga or anime begins with Ryuk and the other death gods in the Shinigami Realm. Ryuk was bored with the lack of activity as all the death gods are relaxing. So he decides to obtain a second Death Note by tricking the Shinigami King, write the instructions in English and drop it into the human world. The plot begins when Light Yagami found the Death Note in the midst of his school.
Creating villain motivations: Writing real adversaries | Now Novel
Batman is one of the longest-lasting characters in DC Comics, debuting over 80 years ago. This gives Batman one of the biggest rogue's galleries in comics , and his villains are arguably more famous than any other superhero's. His villains are also unique in that almost none of them have superpowers and are mostly mobsters and thieves. Those who do have powers often gain them through scientific means. However, that does not make them less dangerous than the superpowered beings that Superman fights. These Batman villains are as dangerous , if not more so than the superpowered villains that run rampant throughout DC, and make up for what they can't do with powers by using their evil intentions.
The Marvel movies are beloved the world over, and they are consistent box office and critical hits. Be aware there are spoilers discussed. So while Kursed and Crossbones are in the MCU, it's unfair to compare their character-lite screentime with other major villains, and thus they've been left off the list.
The most interesting anime villains usually perform good deeds or become one of the protagonists altogether. When a villain switches sides and starts doing good, it's easy to forget about all the crimes they committed by the end of the series. Sometimes a villain might have done something so despicable that viewers weren't down with the idea of having said villain join the protagonists. In most cases, these villains go on to prove their worth and eventually perform good deeds that far outclass their crimes in the past.