Whats the single best tool for wood engraving?

im really interested in wood engraving, but i don’t have any specific tools designed for it (i do have generic chisel’s) is there a single tool, thats good for engraving a single piece of flat wood? kind of like a portrait? and how much would it cost? and could i find it at places like home depot and lowes?


So great if you could take a minute and leave your thoughts on this.