已对照游戏内数据、官方开发直播与补丁说明核验，
已针对 Preludes 15 人工核实。
crafting · Uncommon
低阶和弦石，Tuvalkane Cast 升阶铸造：消耗 Hushed Chordstone + Quenching Acid + Whisprig + Dracs。用于升阶提炼 Lilting Chordstone（首个灯石等级）。
P16 HF4 community patch transcription: Dungeon Rare Chests — added as a possible Chordstone drop; no per-chest guarantee or amount established. Historical forge lead: Cast Hushed Chordstone first, then up-cast to Whispering at Tuvalkane Cast tab — farm Quenching Acid, Whisprig & Dracs in advance. Current Cast ingredients, quantities and gates need independent confirmation.
低阶和弦石，Tuvalkane Cast 升阶铸造：消耗 Hushed Chordstone + Quenching Acid + Whisprig + Dracs。用于升阶提炼 Lilting Chordstone（首个灯石等级）。
P16 HF4 community patch transcription: Dungeon Rare Chests — added as a possible Chordstone drop; no per-chest guarantee or amount established. Historical forge lead: Cast Hushed Chordstone first, then up-cast to Whispering at Tuvalkane Cast tab — farm Quenching Acid, Whisprig & Dracs in advance. Current Cast ingredients, quantities and gates need independent confirmation.
Tuvalkane Cast tab — recipe: Hushed Chordstone + Quenching Acid + Whisprig + Dracs
Pre-farm cast materials via Dermak Undercity / Glades loops
P16 HF4 community patch transcription: Dungeon Rare Chests — added as a possible Chordstone drop; no per-chest guarantee or amount established
同类别材料横向对比，便于判断稀有度与主要掉落来源。
| 物品 | 稀有度 | 主要来源 | 刷取路线 |
|---|---|---|---|
| 呢喃和弦石当前 | Uncommon | Tuvalkane Cast tab — up-cast from… | 有 |
| 琥珀灯石 | Rare | Dismantle: Sovereign weapon → Glow +… | 有 |
| 灵光灯石 | Rare | Dismantle: Legendary weapon → Glow +… | 有 |
| 灯石 | Rare | Dismantle: Noble weapon → Glow Lampyrite | 有 |
| 悠扬和弦石 | Rare | Tuvalkane Refine tab — refine Lilting… | 有 |
| 狂想和弦石 | Rare | Tuvalkane Refine tab — refine… | 有 |
| 和弦石 | Uncommon | Craft: Tuvalkane | 有 |
| 微光灯石 | Uncommon | Dismantle: Noble weapon → Glow Lampyrite | 有 |
| 轻快和弦石 | Uncommon | Tuvalkane Refine tab — refine… | 有 |
| 寂静和弦石 | Common | Tuvalkane Cast tab — craft with… | 有 |
| 混沌和弦石 | Epic | Historical one-time Preludes 15… | 有 |