According to legends, Russian mystic Grigori Rasputin (1869-1916) was first poisoned with enough cyanide to kill ten men, but he wasnt affected. So his killers shot him in the back with a revolver. Rasputin fell but later revived. So, he was shot again three more times, but Rasputin still lived. He was then clubbed, and for good measure thrown into the icy Neva River.

The mysterious Grigory Efimovich Rasputin, a peasant who claimed powers of healing and prediction, had the ear of Russian Tsarina Aleksandra. The aristocracy could not stand a peasant in such a high position. Peasants could not stand the rumors that the tsarina was sleeping with such a scoundrel. Rasputin was seen as "the dark force" that was ruining Mother Russia.

To save the monarchy, several members of the aristocracy attempted to murder the holy man. On the night of December 16-17, 1916, they tried to kill Rasputin. The plan was simple. Yet on that fateful night, the conspirators found that Rasputin would be very difficult to kill.

http://theunexplainedmysteries.com/Grigori-Rasputin-Assassination.html