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Artist's commentary
Raising your Servants
Olga: "Huh, a dream...!"
Gudako: "Looks like you were having a nightmare, or was it a nice dream?"
Olga: "Nothing about those even make any sense! Getting back on topic... You need a duplicate card of a Heroic Spirit to strengthen their Noble Phantasm, which can be upgraded to a maximum level of 5. There are various ways to raise your Heroic Spirits; Ascension increases the maximum level of your Servant and unlocks a new skill, while Skill Enhancement will strengthen the effects of those skills. Find other ways to raise them that benefits you more in battle."