Task 3: Step 2 complete - plan sub-tasks for bug fixes

docs/task3/subtask_10.md

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+# Sub-Task 10: Essence Refining Investigation (Bug 15)
+
+## Scope
+- **Core files to investigate**:
+  - Essence Refining effect logic (e.g., `effects/essenceRefining.ts` or similar)
+  - All enchantment type definitions (e.g., `data/enchantments.ts`, `types/enchantments.ts`)
+  - Enchantment application logic (to check compatibility)
+- **Files potentially affected**:
+  - Any enchantment type that Essence Refining cannot apply to (fix or flag)
+  - Documentation for Essence Refining effect
+
+## Acceptance Criteria
+1. Verify Essence Refining effect works across all enchantment types
+2. Document which enchantment types it cannot apply to (e.g., spell enchantments)
+3. Either:
+   - Fix cases where it should apply but doesn't, OR
+   - Flag out-of-scope cases with clear explanation
+4. Write findings to `docs/task3/essence_refining_findings.md`
+
+## Dependencies
+- None (independent investigation task)
+
+## Estimated Complexity
+- Medium (testing multiple enchantment types + documentation)