You can get this through natural progression but to speed things along load up chapter 11 (The Order) preferably on human difficulty.
After the initial cutscene which you can skip using the back button, you battle against 8 enemies. Have the Aquila (shuriken blades) equipped and use buy-in (LT + Y,Y, pause, Y) to drag all nearby enemies to you, then use tornado (hold down both LT and Y), repeat until all 8 enemies are dead.
You'll know you've beaten the last enemy when the game enters a brief slowdown period and/or a close-up of Dante, pause the game during this and restart the checkpoint, hit the back button to skip the opening cutscene and you're back fighting the group of 8 enemies again. Repeat until you unlock the achievement.