The "Ruler's Edge" is an artifact found in 5 skull dungeons, in my case, a silver chest. It is a melee weapon, and has the following stats and stat bonuses:
6d12 Damage
- Critical: +10%
- Fame Reward: +45%
- Hit Chance: +15%
- Pierce: 10
Ability: Heartwrench
Weight: 6
Value: 4000