What forms of torture did Ivan the terrible use?

Ivan the terrible was known to wack down and slice open live birds. He was known to fry people alive and remove their flesh while they were still struggling. He invited several of his advisors on a winter trip to the country. Halfway there, he stripped them of their royal robes and forced them to return to Moscow naked, on foot, in the snow. He threw live small animals (like cats or birds or mice) off of the tops of buildings. He was a terrible, terrible man indeed. -quote my history book