At level 15 Clerics may choose to become Priests. Unlike Paladins, Priests have larger mana pools and more attack spells at their disposal. That means they can serve as a secondary damage dealer in a party. Their most effective role though, is as a healer. A good priest in a party keeping everybody alive is often the difference between life and death in a dungeon.
In-game screenshots are preferred over model-viewer-generated ones.
The higher the quality the better!
Be sure to read the tips & tricks
if you haven't before.