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To draw a cool weapon, first practice the basic shape of the weapon. It's important to gather a lot of reference materials about weapons and understand their shapes. Also practice drawing clean lines and adding details. It will be more helpful to refer to weapons used in animation. Try to express the texture and shine of the weapon well. Ah, and above all, practice is really important. If you draw hard, you will definitely be able to draw a cool weapon. Fighting, nyan~~