Continuity: When Temujin shoots a flaming arrow to signal his troops to enter Urga, it is night, but when the troops see the arrow, it is daylight.
Continuity: After Temujin kills the Shaman and a guard in Wang Khan's bedroom his sword is clean, but when he bangs on the gong outside the bedroom to address his troops, there is blood on the sword.
Continuity: After Jamuga escapes from his cell and Kasar is killed, a guard pushes him on top of a sundial. The shadow cast by the sundial is pointing left when Jamuga is pushed against the sundial, then pointing right when Jamuga kills the guard.
Revealing mistakes: When Temujin throws a spear at a man in a stream, the wire guiding it is visible. The spear's trajectory is also wobbly.