Eurika didn't bother answering the first question, except for with a nod.
She watched with interest the way William reacted - another nod, like he was on autopilot. Interesting.
"I'm perfectly alive. I was actually here to propose something that would probably be beneficial to both milord and I. Before I start, may I ask that you to not harm me after my short tale?"
Eurika paused - this was a pretty reasonable thing to agree with. She knew that many people feared magic for no reason, and thus she tried to gauge William's expression.
"Like everyone knows, the rise and fall of nations is dependent on power. Whatever form it may be, power is power. Sometimes power is in the form of political ties - other times, it is in the form of mercantile wealth and knowledge. Sometimes, power is knowledge, literally, and other times, power is the ability to cut off a head or two.
"Theoretically speaking, if there was a person who could have raw power at their hands, would one persecute him? Raw power, a potential, a ball of clay waiting to be shaped into anything, razor sharp ceramics, a dainty teacup, a decoration. . . It would be unwise to fear that person. What is wise (again, theoretically,) is to take that person, use him as a tool to further one's motives. Now, if that person were to be abused, the raw power would turn against the one who used it, and leave some sort of wound and inconvenience him in any magnitude. If the person is fairly treated, he shall become a versatile boon in construction a great country to last the ages.
"Now, nothing can come free from cost and its ever constricting grasp. This raw power, the ability to use that raw power, has a certain chance of not doing what it is supposed to do. This is like a cracked teacup in firing it; it is like black blemishes on a celadon pot. In this case, the failure to transcribe power into power causes undesirable effects. Say, an explosion. Is this cost too much to pay for, to be able to force nature to its knees, say, or suggest something to another? Some path that milord desires more than the other one does?
"Let us call this ability to sculpt power into power 'magic', and let us call the ones who can do this a 'mage'. I only ask for milord to hire me, and provide for my basic needs as well as other materials that are needed to harness power, or reduce the chance of failing, or enhancing the skill of the crafter.
(Incidentally, I think this might be a Charisma roll plus one.)