As we know during these deckathelons, you offer recipes for elixirs called "essence of". In the ice deckathelon I got "essence of fire", which gave extra fire damage/accuracy depending on the level of essence. However, in the fire deckathelon, you offer essence of ice I, II, III Which should give extra ice damage/accuracy. Oddly it gives extra fire damage/accuracy just lIke the "essence of fire". Please check the stats of the recipe and correct it accordingly.
