The Spark!jam au is a Cookie Run Kingdom Alternate Universe containing both the beast and ancient cookies as its main storyline, its primary focus is to display how the ancient and beast bonds could work if they were paired with different souljam holders. (derived from the original lore with numerous changes because of constantly changing canon lore)
Pairings are as such:
MFC -> HBC BSC -> DCC (and Holly occassionally) ESC -> GCC SSC -> PVC and SMC -> WLC
Lore wise, the AU starts off with the concept of Pure Vanilla Cookie and White Lily Cookie wanting to offer the beasts a redemption of sorts after facing Silent Salt Cookie and learning of his background through White Lily Cookie. This, along with other reasons in the background (ex: the sealing spell needing to be looked through more thoroughly) causes some ancients to be against it. Despite this, the plan is respected because of the trust everyone puts in Pure Vanilla Cookie. White Lily chooses to separate the beasts from their respective ancient in an effort to prevent any dangers and corruption, for both parties. However, this wasn’t randomly chosen. Each beast has someone that can effectively counter them and someone that has dealt with similar things in their lives. Some ancients, such as Golden Cheese Cookie and Dark Cacao Cookie are against the idea, but entrust Pure Vanilla’s insight. They trust he is wise enough to know who will work with who. Those like Hollyberry Cookie and Pure Vanilla Cookie are more drawn to the idea of redeeming them because of their previous experiences with the beasts, but know it is not wise to keep the two holders of the soul-jam near each other. This separation is meant to give the beasts a new experience to ‘spark’ up the opportunity for a change in their life. Without high expectations or the need for perfection in their life.
The beasts are completely against the idea of redemption. Either by being too torn, thinking it's stupid or not wanting anything to do with ‘’befriending’’ the ancients in the first place. As for the question with Silent Salt, he still is seen as another victim by the beasts. Not knowing he was the one that entrapped them. He realizes that trapping them again will cost a greater sacrifice this time, and that he can no longer do it himself. This doesn’t mean he’s cooperative though, he is against the whole idea and often is closed off when it comes to Pure Vanilla’s help.
The plan occurs after the beasts realize they were pawns in Dark Enchantress Cookie’s hands, and end up being betrayed by her to allow her escape during their Great Battle with the Ancients. Their defeat greatly unstabilized them now that there wasn’t a cookie constantly providing them with their life energy to keep up their forms with their dangers.
Leftover details: The souljams ARE bonded only because of the amount of strength the ancients use to control the beasts. Due to this, the souljams are slightly stained by the beast’s colors. Always being forced to be tied to the beasts, the sacrifice having to be made to keep them under binds. (This au was written before I even knew that jambound was a thing, please don’t correlate the two due to the current drama with jamma)