Once upon a time, there was a man. He was very bright, a doctor. He wanted to help people. He wanted to make them better. So he made these tiny machines that could fix people from the inside all the way out. And people were very happy.
One day, a messenger arrived, from a nearby kingdom (a message from Koruachi Corps) that said 'Come work for us, we'll give all the gold you need for your machines!'
So the healer went, and all was well.
But there was a problem.
The machines could heal or destroy. And the other kingdom was only really interested on one of them. The wrong one.
They tried to shut him down, and push him away. He fought back, and in the cross fire, a number of unprogrammed nanobots got free, and spilled over the man.
And they disassembled him. And he died.
He awoke in the same place, 2 days later. Naked, the lab empty and cold, all his research long gone. The nanobots had memorised his composition, and brought him back, slowly, cell by cell, particle by particle.
He could now partially command the nanobots keeping him alive. He could heal with them, as he wanted, or he could destroy, as they wanted. He found he was angry. And it was high time he did something about it.
My first attempt at a really exotic offensive power. Ralph has the Burst power, which allows for a area effect blast cone (the nanobots would attack everything in that area, like a flamethrower). Also, I needed a healer, so i gave him really good healing stats (nanobot-based, D8-D10). I also consider the nanobots as melee weapons (they probably won't care how far away the adversary is), so i gave them STR+D6 melee. I'm tempted to give him a very basic ability to change his face and skin colour, but am still debating it (too powerful?).