The setting of casting in DND is different from the blue bar in other games. A mage needs to recite the spells he knows every day before he can release the spells he has recited on a new day. When the spell is released, it will be forgotten. Moreover, the mage will have spells every day, and how many times each level of spells can be released is fixed. Therefore, the mage's spell position is more cherished. For a mage who plays DND well, it is very important to choose which spells to remember every morning to deal with various situations of the day.