They're connected to the tree in this visual representation but idk if they're supposed to be symbolic or literal. Are they a part of the seal? Another aspect of the prison??? We know what the tree does but how do the forks work in this equation?????
WHATEVER they actually are, it's possible those are going to start coming into play with this upcoming Mystic Flour Update. They're probably going to be the main driving force in exploring the rest of Beast-Yeast for the characters. Why?
Well if the Tree was the only part to it, then all they would have to do is camp out in the Faerie Kingdom and defend it. From a storytelling AND gamer standpoint, spawn camping ain't fun. So they need another thing for the characters to aim for: the forks.
They're either the Beast's individual prisons, conduits that are keeping the tree alive (like roots feeding nutrients to it), or some other third thing I can't think of rn.
My quirky little game theory is: Dark Enchantress is going to start going for the Forks because the initial plan with the Faerie Kingdom's Seal went nowhere. Spread the enemy forces thin across the entire continent, lead them on a wild goose chase, and then attack the Tree head-on once everyone is occupied with defending the Forks.
Badda-bing badda-boom ya got the Beasts freed and narrative chaos ensues.