This is an easter egg of the previous update. It doesn't have a lore, the devs only put it there in response to the rant players have made on the forums about Candia and "Sweet Dreams" questline. The sugar cube there is to make fun of the players who complained about the previous update (Candia), saying it was too childish, too colorful... wanting to show that they know how to create demonic and "scary" content... Azzilon's castle has several symbols on the ground, demonic and horrendous creatures... just like people asked for and complained about in the summer update. This was CipSoft creative "rant".