This ruler sent Sheremetev against Perekop, defeating the Tatars after havi
This ruler sent Sheremetev against Perekop, defeating the Tatars after having conquered Kazan.  He captured Narva and Dorpat but left Livonia after threats from Sigismund II.  This ruler once threatened to abdicate until popular pressure brought him back to power.  When this ruler came to power he fed the boyar Andrei Shuisky to his dogs and his secret police was called the (*) Oprichniki. This ruler called for the construction of St. Basil's Cathedral, and earned his epithet in the second half of his reigns for such acts as massacring Great Novgorod.  For 10 points, name this Grand Prince of Muscovy and first Tsar of Russia, nicknamed "The Terrible."
This ruler sent Sheremetev against Perekop, defeating the Tatars after having conquered Kazan.  
{Ivan IV} [accept {Ivan the Terrible} before mentioned]