Values shown as Small / Large / Unique.
| Artefact | Effect | Small | Large | Unique |
| Architect | Building & wall durability | ×4 | ×3 | ×5 |
| Boots | Troop movement speed | ×2 | ×1.5 | ×2.5 |
| Spies | Scouting & counter-scout | ×5 | ×3 | ×10 |
| Diet | Crop consumption | 50% | 75% | 50% |
| Trainer | Training time | 50% | 75% | 50% |
| Cranny | Cranny size + catapult aim, and pierces enemy crannies | ×3 · 20% | ×2 · 10% | ×6 · 20% |
| Storage | Unlocks Great Warehouse / Granary | ✓ | ✓ | - |
| Fool | Cycles 6 effects every 12h | ✓ | - | ✓ |
The Cranny artefact is a single artefact that works both ways. The multiplier (×3 / ×2 / ×6) is how much bigger YOUR own crannies become; the pierce percentage is how much of the resources hidden in an ENEMY cranny your attacks can still plunder. The pierce stacks relatively with the Teuton tribe bonus, never additively - a Teuton holding the Unique pierces 36%, not 40%. Storage artefacts are required for EVERY level of the Great Warehouse / Great Granary, not just the first one.