As for your cutting fantasies, tread very carefully in this area. Anytime you break the skin, whether that be with a cane, a knife, in play piercing, or with any type of sharp implement, you risk possible infection. Cutting with sharp knives carries the additional risk of a slipup causing serious, permanent damage or even death. While fantasies of such edge play create a high level of excitement, the reality carries an even greater degree of risk. Do not engage in such activities with an amateur, or even an underskilled professional.
Edge play skirts the edges of safe and sane play.
In order to maximize your potential for coming out in one piece, never undertake any edge play without extensive negotiations. Such negotiations should include making sure the mistress knows CPR and has a nearby phone to dial 911. I recommend finding someone who will enact your fantasy without actually cutting you. The careful use of a knife as a prop may create the desired excitement level without actually endangering your life. But mistakes can happen, even with a dull costume knife.