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Socket items, Seed Sphere and Jewel of Harmony in MU Online

Advanced enhancement systems: socket items, seed spheres and the Jewel of Harmony. Understand how to make your gear unique.

VI ViciadosMU Team · Updated on 30 jun 2026 · ⏱ 5 min read

Beyond refining with Bless/Soul/Life, MU Online has advanced enhancement systems: socket, seed spheres and the Jewel of Harmony. They make your gear unique.

Dica: Quick answer: socket items have slots for seed spheres (specific bonuses); the Jewel of Harmony adds an extra special option. They're layers of power beyond common refining.

Socket items + Seed Spheres

  • Socket items have 1 to several slots;
  • You insert seed spheres (made by the Seed Master) in each socket;
  • Each sphere adds a bonus (damage, defense, recovery…);
  • Combining the right spheres customizes the item for your build.

Jewel of Harmony

  • Adds a Harmony option to the item;
  • That option can be improved (with risk);
  • It's an upgrade separate from refining and Excellent options.
SystemWhat it adds
Socket + SeedBonus per slot (customization)
HarmonyExtra special option (upgradable)
Nota: These systems exist from the intermediate seasons on. Availability and effects vary — check on your server.
Atenção: Improving Harmony and altering sockets can have risk/cost. Plan before applying to valuable items.

See also sets and items, the Jewel system and Ancient sets by class.

Perguntas frequentes

What are socket items?

They're items with sockets where you place seed spheres, which add specific bonuses. It's a gear customization system from the intermediate/modern seasons.

What does the Jewel of Harmony do?

Harmony adds a special option (a Harmony option) to the item, which can be improved. It's an extra upgrade, separate from normal refining and Excellent options.

VI

ViciadosMU Team

Equipe editorial do ViciadosMU — portal de MU Online no ar desde 2003.

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