The seasonal event tracks here go surprisingly hard. "聖海の光奏曲" has this radiant choral energy, and the Halloween and New Year's pieces commit fully to their moods without feeling gimmicky. "Grand Battle" and "Extra Battle" are where things get serious, both cranking up the orchestral intensity past anything in the previous volumes.
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"Battle ~天海の試練~" layers in choir work that gives it this almost sacred-combat feeling. The Iggozzo city tracks split nicely between upper-class shine and lower-slum grit. "夢幻の調べ" is dreamlike in a way that actually earns the word.
Honestly just a remarkably consistent series. If you liked Vol.1 and 2, this keeps building on everything they established.