

How to turn aflat bar into a sickle?
I want to cut this flat bar thinner, leaving it thick and thin as needed roughly based on the sketch. Flat bar is about 12" long, 2.5" wide and 2mm thick.
I've been hammering at this thing on the other edge forever and it's barely making it curve.
How do I get the aggressive curve? Is there a tool I can use?
Where should I be hammering?
How should I be hammering?