Thank you for pointing that out let me reconsider and revise..
I have a way of escaping that uses an item that has been established.
A: In the interest of keeping it simple the thing the most obvious answer for something Harry can do that he in theory could teach Voldermort/keep him talking is partial transfiguration.
B: Once Harry tells Voldermort that he can partially transfigure things, Voldermort will want to know the words/motions. Harry can say that he can teach Voldermort (he can't teach him how to cast a Patronus due to Voldermort's lack of love and he can't teach him how not to fear the death the way Harry doe...
Okay the new plan works like this.
Harry will say in Parseltongue that he will transfigure two objects, one to show the basic principles, one to show the more advanced applications of it/what you can do after you master the skill. Either of the objects he will be transfiguring materials into will have any magical properties, they will not allow him to kill Voldermort, and they will not allow him to magically escape the graveyard.
Harry will then transfigure his glasses (using the hold in one hand method I described in the first plan), to change just the col... (read more)