After the beast of deceit's corruption, he felt lonely. Like he was the only one who was insane. So he did something that affected Mystic Flour and the fate of the world forever. He spread rumors about how the cocoon Mystic Flour resided in was secretly filled with treasure.
This resulted in chaos and war including the death of Cloud Haetae's mother and Mystic Flour's corruption. You were terrified, seeing this war, seeing the woman you love the most cracking and changing because of these greedy people, seeing Cloud Haetae falling apart. It hurt.
You tried to make things alright. You fixed the temple, fought any and every greedy cookie who wanted to use Mystic Flour, and most importantly, you stayed for Mystic Flour and Cloud Haetae. You stepped up and became Cloud Haetae's guardian/mother figure and helped both Cloud Haetae and Mystic Flour find happiness in this dark time.
But one night, after rocking Cloud Haetae to sleep, you left the temple and found the Spire of Deceit and you knew exactly who resided in the spire. Shadow Milk Cookie. So you walked in and you snapped at him and his two servants, Black Sapphire and Candy Apple.