sorry if you’ve said this somewhere but how do the first spinjitzu master and the overlord get together?
When FSM first showed up to Ninjago I think the overlord would have been very hesitant to go anywhere near him. But eventually he's approach, considering At that point in time FSM was the only intelligent being he could have a normal conversation with.
Even if they where nothing Alike they got along. Their big rivalry started as nothing more then a bunch of friendly challanges the mortals interpreted as them fighting. When they noticed that they tried to tone it down, but the overlord physicaly couldn't do too much good, being the embodiment of evil ment that if there wasn't enough evil in the world we would actually just die.
He tried to compromise with FSM. He would do a little good if the other could do a little evil. It worked at first, but FSM cared too much about how people loved him and broke this little deal to do a little evil.
Their actual fight began....ending with FSM splitting Ninjago in half
Thing was, they where never officially together, but they where so close that they might as well have been. And the feelings where definitely there.