Priest Spell Memorization
Priests do not need to memorize specific spells like wizards, due to their divine nature. Every day they receive the ability to cast a number of spells, which represents their ability to channel divine energy through their body. They do not have the ability to cast further spells until the start of the next day (at dawn). Spells slots of a higher level can be used to cast spells of a lower level (a 3rd level slot can be used to cast a 1st, 2nd, or 3rd level spell)
Priests have access to certain spheres (determined by class) and have access to spells from listed in the Player’s Option: Spells & Magic index. Any spells from other sources (Priest Spell Compendiums, other modules, or other books) or ones that the player wants to make, must be researched first. Some spells may be made available to start if they are related to a particular deity or class.