Refining a legendary item gives it a random stat boost, within is a list of known boosts.
List of Known Refinements
- Defense: Armor +4, Magic Resistance +4
- Protection: Armor +8
- Protection: Shield +8 (Shield and Armor are mislabeled sometimes, maybe same as above?)
- Rebirth: Life regen +8
- Savage: Attack Damage +4
- Sharpness: Armor Penetration +4 and Magic Penetration +4
- Thirst: Lifesteal +8
- Vigor: Health +16
- Wisdom: Skill Power +4
UPD: Looks like the patch on 1/30/18 made everything craftable, so this section might not be useful.
Hammer of Zeus
Avaliable from the Master of Explosions guild battle.
- 30 Gold
- Attack +7
- When killing an enemy unit permanently gain Attack Damage +1 (Max Stacks: 5)
- Note: this effect persists even after later selling the weapon.