Bond or no Bond, they are not legally enforceable!
You have paid for all your training, so on what grounds with they be able to enforce any kind of bond!
I believe however absurd it might seem to sound, such a bond would make you a "slave" As I am not considering this myself, I havent gone into depth about this, however after conversation with a lawyer friend of mine about this some time ago, he was pretty sure that no such bond would be legally enforceable!
In other words, pack your bags and leave whenever you want, Lion don't have a leg to stand on!