diff --git a/internal/lightcone/hunt/shadowedbynight/data.go b/internal/lightcone/hunt/shadowedbynight/data.go
new file mode 100644
index 00000000..d5fa8342
--- /dev/null
+++ b/internal/lightcone/hunt/shadowedbynight/data.go
@@ -0,0 +1,71 @@
+// Code generated by "weapstat"; DO NOT EDIT.
+
+package shadowedbynight
+
+import "github.com/simimpact/srsim/pkg/engine/equip/lightcone"
+
+var promotions = []lightcone.PromotionData{
+	{
+		MaxLevel: 20,
+		HPBase:   38.4,
+		HPAdd:    5.76,
+		ATKBase:  21.6,
+		ATKAdd:   3.24,
+		DEFBase:  18,
+		DEFAdd:   2.7,
+	},
+	{
+		MaxLevel: 30,
+		HPBase:   84.48,
+		HPAdd:    5.76,
+		ATKBase:  47.52,
+		ATKAdd:   3.24,
+		DEFBase:  39.6,
+		DEFAdd:   2.7,
+	},
+	{
+		MaxLevel: 40,
+		HPBase:   145.92,
+		HPAdd:    5.76,
+		ATKBase:  82.08,
+		ATKAdd:   3.24,
+		DEFBase:  68.4,
+		DEFAdd:   2.7,
+	},
+	{
+		MaxLevel: 50,
+		HPBase:   207.36,
+		HPAdd:    5.76,
+		ATKBase:  116.64,
+		ATKAdd:   3.24,
+		DEFBase:  97.2,
+		DEFAdd:   2.7,
+	},
+	{
+		MaxLevel: 60,
+		HPBase:   268.8,
+		HPAdd:    5.76,
+		ATKBase:  151.2,
+		ATKAdd:   3.24,
+		DEFBase:  126,
+		DEFAdd:   2.7,
+	},
+	{
+		MaxLevel: 70,
+		HPBase:   330.24,
+		HPAdd:    5.76,
+		ATKBase:  185.76,
+		ATKAdd:   3.24,
+		DEFBase:  154.8,
+		DEFAdd:   2.7,
+	},
+	{
+		MaxLevel: 80,
+		HPBase:   391.68,
+		HPAdd:    5.76,
+		ATKBase:  220.32,
+		ATKAdd:   3.24,
+		DEFBase:  183.6,
+		DEFAdd:   2.7,
+	},
+}
\ No newline at end of file
diff --git a/internal/lightcone/hunt/shadowedbynight/shadowedbynight.go b/internal/lightcone/hunt/shadowedbynight/shadowedbynight.go
new file mode 100644
index 00000000..e707fe58
--- /dev/null
+++ b/internal/lightcone/hunt/shadowedbynight/shadowedbynight.go
@@ -0,0 +1,93 @@
+package shadowedbynight
+
+import (
+	"github.com/simimpact/srsim/pkg/engine"
+	"github.com/simimpact/srsim/pkg/engine/equip/lightcone"
+	"github.com/simimpact/srsim/pkg/engine/event"
+	"github.com/simimpact/srsim/pkg/engine/info"
+	"github.com/simimpact/srsim/pkg/engine/modifier"
+	"github.com/simimpact/srsim/pkg/engine/prop"
+	"github.com/simimpact/srsim/pkg/key"
+	"github.com/simimpact/srsim/pkg/model"
+)
+
+const (
+	check = "shadowed_by_night"
+	buff  = "shadowed_by_night_spd_buff"
+)
+
+type state struct {
+	spdAmt float64
+	flag   bool
+}
+
+// Increases the wearer's Break Effect by 28/35/42/49/56%.
+// When entering battle or after dealing Break DMG, increases SPD by 8/9/10/11/12%, lasting for 2 turn(s).
+// This effect can only trigger once per turn.
+func init() {
+	lightcone.Register(key.ShadowedbyNight, lightcone.Config{
+		CreatePassive: Create,
+		Rarity:        4,
+		Path:          model.Path_HUNT,
+		Promotions:    promotions,
+	})
+
+	modifier.Register(check, modifier.Config{
+		Listeners: modifier.Listeners{
+			OnPhase1:      resetFlag,
+			OnAfterHitAll: applySpdBuff,
+		},
+	})
+
+	modifier.Register(buff, modifier.Config{
+		Stacking:      modifier.ReplaceBySource,
+		StatusType:    model.StatusType_STATUS_BUFF,
+		CanDispel:     true,
+		BehaviorFlags: []model.BehaviorFlag{model.BehaviorFlag_STAT_SPEED_UP},
+	})
+}
+
+func Create(engine engine.Engine, owner key.TargetID, lc info.LightCone) {
+	beAmt := 0.21 + 0.07*float64(lc.Imposition)
+	spdAmt := 0.07 + 0.01*float64(lc.Imposition)
+	state := state{
+		spdAmt: spdAmt,
+		flag:   false,
+	}
+	engine.AddModifier(owner, info.Modifier{
+		Name:   check,
+		Source: owner,
+		Stats:  info.PropMap{prop.BreakEffect: beAmt},
+		State:  &state,
+	})
+
+	engine.Events().BattleStart.Subscribe(func(event event.BattleStart) {
+		engine.AddModifier(owner, info.Modifier{
+			Name:     buff,
+			Source:   owner,
+			Stats:    info.PropMap{prop.SPDPercent: spdAmt},
+			Duration: 2,
+		})
+	})
+}
+
+func resetFlag(mod *modifier.Instance) {
+	st := mod.State().(*state)
+	st.flag = false
+}
+
+func applySpdBuff(mod *modifier.Instance, e event.HitEnd) {
+	if e.Hit.AttackType != model.AttackType_ELEMENT_DAMAGE {
+		return
+	}
+	st := mod.State().(*state)
+	if !st.flag {
+		mod.Engine().AddModifier(mod.Owner(), info.Modifier{
+			Name:     buff,
+			Source:   mod.Owner(),
+			Stats:    info.PropMap{prop.SPDPercent: st.spdAmt},
+			Duration: 2,
+		})
+	}
+	st.flag = true
+}
diff --git a/pkg/key/lightcone.go b/pkg/key/lightcone.go
index bf2afa89..17e3bdbe 100644
--- a/pkg/key/lightcone.go
+++ b/pkg/key/lightcone.go
@@ -31,6 +31,7 @@ const (
 	ReturntoDarkness        LightCone = "return_to_darkness"
 	SleepLiketheDead        LightCone = "sleep_like_the_dead"
 	IntheNight              LightCone = "in_the_night"
+	ShadowedbyNight         LightCone = "shadowed_by_night"
 )
 
 // Nihility
diff --git a/pkg/simulation/imports.go b/pkg/simulation/imports.go
index 78e8c59e..bac59f66 100644
--- a/pkg/simulation/imports.go
+++ b/pkg/simulation/imports.go
@@ -82,6 +82,7 @@ import (
 	_ "github.com/simimpact/srsim/internal/lightcone/hunt/onlysilenceremains"
 	_ "github.com/simimpact/srsim/internal/lightcone/hunt/returntodarkness"
 	_ "github.com/simimpact/srsim/internal/lightcone/hunt/riverflowsinspring"
+	_ "github.com/simimpact/srsim/internal/lightcone/hunt/shadowedbynight"
 	_ "github.com/simimpact/srsim/internal/lightcone/hunt/sleeplikethedead"
 	_ "github.com/simimpact/srsim/internal/lightcone/hunt/subscribeformore"
 	_ "github.com/simimpact/srsim/internal/lightcone/hunt/swordplay"