His own, of course!
As far as Midas was concerned, the only side worth choosing was his own. Everyone else's side was not even an option.
In this case, Midas had to go make preparations.
Bidding the Second Elder farewell and promising to speak the next day, walked out of the Council Building, having given his congratulations to everyone involved.
Leaving the Council Building, he went straight back to his house with his friends in tow and locked the doors behind him, sending the two to sleep before heading off into his room where he intended to spend the whole night awake.
What was he going to do?
Unlock the power of Origin Energy!
The first instance of Midas "understanding" what Origin Energy was when he was in the First Trial, and he was involved in his first fight. A 5:2 fight with some random strangers who were just too arrogant and deserved to be taught a lesson.