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Devil Square event guide: mass XP and Zen

Devil Square is an arena of monster waves, great for XP and Zen. See how to enter and survive to the end.

VI ViciadosMU Team · Updated on 30 jun 2026 · ⏱ 6 min read

Devil Square is a closed arena where you face waves of monsters for a set time. It's one of the best sources of XP and Zen in MU Online.

Dica: Quick answer: assemble your level's Devil's Invitation, enter at the event time, and survive the waves killing as much as possible to stack XP and Zen.

How to enter

  1. Get the Devil's Eye and Devil's Key (from drops);
  2. Combine them at the Chaos Goblin to create the Devil's Invitation for your level;
  3. Use the invitation at the event time.

How it works

Inside the arena, monsters spawn in waves. Your goal is simple: kill the most and survive until time runs out. The more you kill, the more XP and Zen you take.

Nota: There are several Devil Square levels by character level. Always use the right invitation for the best reward.

Tips

  • Area damage classes shine here (Dark Wizard, AoE builds);
  • Bring lots of potions — the waves give no rest;
  • Keep moving to avoid being surrounded;
  • Do it in a group to clear waves faster.
Atenção: Don't underestimate the final waves: they come stronger. Save potions and, if needed, retreat to heal before returning.

Perguntas frequentes

How do I enter Devil Square?

You need the Devil's Invitation (assembled at the Chaos Goblin from the Devil's Eye and Devil's Key for your level) and use it at the event time.

Is Devil Square worth doing?

Yes. It's one of the best XP and Zen events in MU, especially while leveling. Surviving all the waves pays off a lot.

VI

ViciadosMU Team

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

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