Eternal Radiance
Phoebe and later Spectro units that lean on Spectro Frazzle prefer this over generic Celestial Light once the set is available.
Eternal Radiance is farmed at Tacet Field — Eternal Radiance in Rinascita. The 2-piece bonus (Spectro DMG +10%) is useful on hybrid sets when you only need partial value from this sonata.
The 5-piece effect (CRIT and Spectro bonuses for frazzle-oriented Spectro carries) is why you commit a full sonata. Run it on resonators whose kit actually triggers that bonus — not every Rinascita farmer needs five matching pieces on day one.
Who farms it: Phoebe, Zani, and Spectro carries built around frazzle windows.
When to farm: Farm when Phoebe is your weekly clear. Spectro Rover can stay on Celestial Light.
On EchoPatch, Eternal Radiance appears in 3 curated builds, including Phoebe and Zani. Compare those builds before spending Waveplates so you know whether you want the 2-piece splash or the full 5-piece setup.
2-Piece Bonus
Spectro DMG +10%
5-Piece Bonus
CRIT and Spectro bonuses for frazzle-oriented Spectro carries
Spectro