Agents of this institution carried brooms and dog's heads to represent their sweeping away and sniffing out of their leader's enemies, most famously displayed in the 1570 sack of Novgorod.
According to an account by Heinrich von Staden, members of this institution hung Prince Andrei Ovtsyn with a sheep to make a pun on his last name. The creation of this institution was spurred by the issuance of two letters from Alexandrova Sloboda. Philip Kolychev was murdered for his public denunciation of this institution. One of this institution's most infamous acts was partially caused by the turncoat Teterin surrendering the city of Izborsk to (*) Lithuania. Agents of this institution carried brooms and dog's heads to represent their sweeping away and sniffing out of their leader's enemies, most famously displayed in the 1570 sack of Novgorod. For 10 points, name this institution created by Ivan IV designed to consolidate his power and terrorize the Russian populace.
According to an account by Heinrich von Staden, members of this institution hung Prince Andrei Ovtsyn with a sheep to make a pun on his last name.
Oprichnina (accept oprichniki)