Battle of Red Cliffs - Firecracker Blade - Fruit Ninja
The year of 208 A.D. Hosted the Battle of Red Cliffs. So to achieve the score to attain the firecracker blade you must achieve a score of exactly 208 in either zen mode, arcade mode, or if you have the lite version you can get this blade on classic mode.
You'll get the Firecracker Blade if you can finish a game (in any mode) with a score of exactly 208. This is because the year of the battle of the red cliffs was 208 AD.