World greatest power

Once upon a time their was a world with great power.
People that are cursed by the immortal witch gems can live for ever unless their killed.
But this special Cursed goes with power.
Some used it for evil other for good.
Someone call Cristina had a great power beyond all and capture other people like here.
Some special agent new the weakness of all power, since Cristina was weak she joined in.
My name is Helson and am part of those who were cursed.
Those special agent are called shadows agent.
We shall show everyone that if you stand in our way we will realy show you what is a greatest power,and people that betrayed us should surfer including Cristina.
And liberate our brothers and sisters.