Religion measures a character’s knowledge of gods, religions, rites, and systems of morality. The most commonly used ability score is Intelligence. Examples include the following activities:
| DC | Activity |
| 10 | Recognize a holy symbol or important site |
| 15 | Sense the presence of a holy or unholy aura; identify signs of undead or fiends |
| 18 | Identify the purpose of an esoteric religious ritual |
| 20 | Convert someone with strong beliefs to your faith; recognize the rituals of long-dead religionsWow an archmage with your expertise; recreate a complex ritual from memory |