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Ruthless Aggression is the 5th stage in Blur, where you have to face Natalya, the 5th rival. When you beat her, you get her car, the BMW Concept 1 Series tii (Race), and a mod, Quadshock, which lets you have 4 shock domes instead of 3. Her demands are reverse Shunt 5 cars, Shock 10 cars, hit multiple cars with 5 Barges, and finish the Fan Run in Event 6.