Depending on your Divine Domain, you might serve as a front-line martial warrior similar to the Paladin and the Fighter, you might be a durable support caster and healer, or you might largely ignore friendlier spellcasting in favor of incinerating your foes with divine magic. Your domain determines not only your character’s central them as a divine spellcaster, but also your role on the battlefield. Your choice of domain is the single most important decision that you will make when playing a cleric.