sentences:  Frustrated at another betrayal, Sigma considers Leo dead to him while developing a personal vendetta against Kouga.Shortly afterwards, with the time now being ripe for Idea's activation with the Madō spell enhancing Awakening Moon event drawing near, Sigma tricks the Makai Knights by claiming to spare all save Kouga if they renounce their Makai Knighthood.With the Makai Knights gathered to debate this, Sigma formed a barrier around them so he can enter the True Demon World without interference.