Grigori Rasputin was a historical figure in Russian history. He volunteered to help heal Tsarevich Alexei who was suffering from hemophilia. Before his exploits were known, he was believed to have mystical powers, and an apparent closeness to his religion, Christianity. His aid to the Tsarevich helped cement his relationship with the ruling noble family Romanov. His image as a monk, spiritual healer, prophet and man of God was quickly spread throughout Russia. The Tsar and his family depended on him heavily for advice.
This adds to the apparent dislike of him and the Romanov family by others; nobles, politicians, journalists and even the Russian Orthodox Church. He became a controversial figure, and accused of abusing his privileges with the noble family for control over the rulings in Russia, such as suggesting the ill-equipped Tsar to be in full command over the Russian military. Truthfully, Rasputin succumbed to all worldly temptation; such as sex and alcohol, believing that it can also be a path to piety and salvation.
This controversy culminated into hatred, and subsequently many attempts on his life were made. He was (reportedly) stabbed, poisoned, shot, beaten, castrated and finally drowned in the Moika River. This is almost guaranteed to be false; a lie to prevent him from being canonized (made into a saint after death) due to a rule which prevents drowning victims from being made saints, while simultaneously making him seem demonic or a warlock (devil pact maker, male witch).
His life, as well as his death, became the stuff of legends; it was said that he survived all the murder attempts, and even after his body was buried, dug up and burned, it seemingly went alive, if only for a moment.