speculation 1) eating all the cakes will grant you one (1) wish exactly like  dragon ballz

speculation 2) there’s a cake for every primal culture, yes that means:

sunfire elves: lemon lava cake

earthblood elves: can and WILL serve you “potted plant dessert that is just a crushed oreo and a sprig of mint” cake

ocean elves: raindrop cake

moonshadow elves: red green velvet cake

sky elves: sky roll cake

dark magic: black forest cake (or claudia’s pancakes)