Episode Prequel

Long before time had a name, the first spinjitzu master created Ninjago, using four elemental weapons, but when he passed a dark presence sought out to collect them all, Lord Garmadon, so I, sensei Wu, his brother sought out four ninja to collect them first, but an unexpected turn happened to me while I hid the weapons, I found a baby boy on the door step of the monastery, taking him in, I adopted him, and raised him as my own, but I found out that there is more to the boy then meets the eye...