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 · Epic
特殊和弦石——非铸造配方，仅通过 Dispatch 奖励或 P15 迁移（Orlick 邮件）获取。直接用于武器精炼，不可在 Tuvalkane 铸造。
Historical one-time Preludes 15 migration Dispatch: eligible accounts received Chaos Chordstones based on remaining Stock weapons. The notice says they were only available through that Dispatch at the time. A repeatable current farm or ongoing reward is not established; check your original Dispatch rather than grinding messages.
特殊和弦石——非铸造配方，仅通过 Dispatch 奖励或 P15 迁移（Orlick 邮件）获取。直接用于武器精炼，不可在 Tuvalkane 铸造。
Historical one-time Preludes 15 migration Dispatch: eligible accounts received Chaos Chordstones based on remaining Stock weapons. The notice says they were only available through that Dispatch at the time. A repeatable current farm or ongoing reward is not established; check your original Dispatch rather than grinding messages.
Dispatches — recurring Chaos Chordstone reward drops
P15 Orlick mail — one-time migration reward per Stock/Noble weapon — legacy
NOT a Tuvalkane recipe — no Cast or Refine tab option
No Lampyrite requirement; Chaos stands outside the normal tier chain
Historical one-time Preludes 15 migration Dispatch from Orlick for eligible remaining Stock weapons; the captured notice says Chaos Chordstones were unavailable elsewhere at that time
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 |
|---|---|---|---|
| 混沌和弦石当前 | Epic | Historical one-time Preludes 15… | 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 |
| 呢喃和弦石 | Uncommon | Tuvalkane Cast tab — up-cast from… | 有 |
| 寂静和弦石 | Common | Tuvalkane Cast tab — craft with… | 有 |