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KB Article: 57795
KB Category: [Game Contents]
KB Sub-category: [Gameplay]
How do I summon an Esper?
Once per wave, you have the option of using crystals to summon a powerful Esper. Espers cannot be summoned if you do not possess the right amount of crystals. You can check the number of crystals required to summon an Esper by selecting the desired Esper.
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