The tale of Ninjago

Once before time had a name the first spinjitsu master created ninjago using the tornado of creation, but the overlord wanted to have the balance of good and evil disrupted. So he created an indestructible army [called the stone army] to destroy the spinjitsu master his back was against the wall, but he didn't quit. He banished the stone army and the overlord and passed his elemental powers to four kids to be born soon.

Meanwhile he has two sons Sensei Wu 

And Lord Garmodon

You see he wasn't always evil 

Now Sensei Wu's story

to be continued...