We had noticed a bug with the interaction of the "Strength" skill and "Wafer Strength". The HP stacking was calculated wrongly during battle, causing the HP of the magical beast to increase abnormally and not aligned with the HP displayed in the collection interface. We have fixed the bug during the last update so now the stacking should be calculated normally.
We strive to always offer wizards a healthy and balanced battle environment, thank you for your understanding and sorry for any
"FAIRY TAIL: Forces Unite!" Operation Team