- 335 - 409 Slashing Damage
- +250 Armor Piercing
- +50% Critical hit damage bonus
- +5% Critical hit chance
- +10% Chance to cause bleeding
- +5% Bonus experience from humans and nonhumans.
This diagram is located in Bastoy Prison ruins. Head towards the lake northwest of Beauclair and then head west. Climb the walls to ascend the tower. The diagram will be found on the scaffolding.
- Video guide to the location:
| Angivare | | Ard'aenye | | Ashrune | | Barber-Surgeon | | Beauclair Steel Sword | | Black Unicorn | | Bloed Aedd | | Caerme | | Caroline | | Cleaver hood | | D'yaebl | | Dancer | | Daystar | | Devine | | Diagram Abritrator | | Diagram Beann'shie | | Diagram Black Unicorn | | Diagram Longclaw | | Forgotten Vran Sword | | Glory of the North | | Grandmaster Griffin Steel Sword | | Grandmaster Wolven Steel Sword | | Gwestog | | Gwyhyr | | Harvall | | Headhunter | | Hen Gaidth Steel Sword | | Hjalmar's steel sword | | Hope | | Inis | | Lune | | Mourner | | Princess Xenthia's sword | | Superior Dol Blathanna sword | | The Emmentaler | | Tir Tochair Blade | | Tor Lara | | Toussaint Ducal Guard Officer's Steel Sword | | Ultimatum | | Wolf (Weapon) |