The Inquisitors wander the world seeking hotbeds of heresy. Once they encounter Apostates, they thoroughly study their strengths and weaknesses. Conduct this Study and the Inquisitors will be able to attack level IV Apostates.
| Level | Food | Lumber | Iron | Stone | Silver | Gold | Time | Requirements | Allows you to attack level IV Apostates | Power | Hero's Experience |
| 1 | 12M | 12M | 12M | 12M | 12M | 275K | 14w 1d 00h 00m 00s | ✓ | 1.1M | 490K |
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