Merlok in the Genesis tank.
A lot of people don't realise it but the brothers are actually from the future.

Just to clear things up, the brothers are not genetically modified or altered or enhanced. The only thing un-natural about their creation is the fact that they were concieved through artificial insemination, then grown in a tank.

Granted they took part in experiments, but they are 100% natural.

Anyway, This is a scene from the as yet unwritten book 10, which may never happen since the plot's a bit weak right now...
but I'll cross that bridge when I come to it.