diff --git a/db/re/mob_db.yml b/db/re/mob_db.yml
index 4ff6123d2d8..6c5944d7b36 100644
--- a/db/re/mob_db.yml
+++ b/db/re/mob_db.yml
@@ -109053,6 +109053,7 @@ Body:
     AttackMotion: 960
     ClientAttackMotion: 480
     DamageMotion: 576
+    DamageTaken: 10
     Ai: 24
   - Id: 20849
     AegisName: SUMMON_WOODEN_FAIRY
@@ -109076,6 +109077,7 @@ Body:
     AttackMotion: 1152
     ClientAttackMotion: 864
     DamageMotion: 576
+    DamageTaken: 10
     Ai: 24
   - Id: 20850
     AegisName: SUMMON_CREEPER
@@ -109099,6 +109101,7 @@ Body:
     AttackMotion: 840
     ClientAttackMotion: 600
     DamageMotion: 576
+    DamageTaken: 10
     Ai: 24
   - Id: 20851
     AegisName: SUMMON_HELLTREE
@@ -109122,6 +109125,7 @@ Body:
     AttackMotion: 1080
     ClientAttackMotion: 840
     DamageMotion: 480
+    DamageTaken: 10
     Ai: 24
 #  - Id: 20856
 #    AegisName: MD_N_ARENA_1
diff --git a/db/re/skill_db.yml b/db/re/skill_db.yml
index d37eaed14aa..b39c56b75df 100644
--- a/db/re/skill_db.yml
+++ b/db/re/skill_db.yml
@@ -36687,8 +36687,6 @@ Body:
         - Level: 5
           Amount: 60
       State: Shield
-      Status:
-        Attack_Stance: true
     Status: Shield_Power
   - Id: 5266
     Name: IG_OVERSLASH
@@ -37618,8 +37616,6 @@ Body:
           Amount: 55
         - Level: 5
           Amount: 60
-      Weapon:
-        Dagger: true
   - Id: 5292
     Name: SHC_IMPACT_CRATER
     Description: Impact Crater
@@ -37630,7 +37626,7 @@ Body:
       Splash: true
       Critical: true
     Hit: Multi_Hit
-    HitCount: 1
+    HitCount: 5
     Element: Weapon
     SplashArea:
       - Level: 1
@@ -37668,10 +37664,6 @@ Body:
           Amount: 70
         - Level: 5
           Amount: 78
-      Weapon:
-        Katar: true
-      Status:
-        Rollingcutter: true
     Status: WeaponBlock_On
   - Id: 5293
     Name: SHC_ENCHANTING_SHADOW
diff --git a/src/map/battle.cpp b/src/map/battle.cpp
index bc9f8091ac6..171b0523a9c 100644
--- a/src/map/battle.cpp
+++ b/src/map/battle.cpp
@@ -3082,8 +3082,13 @@ static bool is_attack_critical(struct Damage* wd, block_list *src, const block_l
 			case GC_CROSSIMPACT:
 			case SHC_SAVAGE_IMPACT:
 			case SHC_ETERNAL_SLASH:
-			case SHC_IMPACT_CRATER:
 			case SHC_CROSS_SLASH:
+				cri /= 2;
+				break;
+			case SHC_IMPACT_CRATER:
+				if (sd == nullptr || sd->weapontype1 != W_KATAR)
+					return false;
+
 				cri /= 2;
 				break;
 			case WH_GALESTORM:
diff --git a/src/map/skills/thief/impactcrater.cpp b/src/map/skills/thief/impactcrater.cpp
index 0504cf75c5d..420bbf7109d 100644
--- a/src/map/skills/thief/impactcrater.cpp
+++ b/src/map/skills/thief/impactcrater.cpp
@@ -11,13 +11,6 @@
 SkillImpactCrater::SkillImpactCrater() : SkillImplRecursiveDamageSplash(SHC_IMPACT_CRATER) {
 }
 
-void SkillImpactCrater::modifyDamageData(Damage& dmg, const block_list& src, const block_list& target, uint16 skill_lv) const {
-	const status_change *sc = status_get_sc(&src);
-
-	if (sc != nullptr && sc->hasSCE(SC_ROLLINGCUTTER))
-		dmg.div_ = sc->getSCE(SC_ROLLINGCUTTER)->val1;
-}
-
 void SkillImpactCrater::calculateSkillRatio(const Damage *wd, const block_list *src, const block_list *target, uint16 skill_lv, int32 &skillratio, int32 mflag) const {
 	const status_data* sstatus = status_get_status_data(*src);
 
diff --git a/src/map/skills/thief/impactcrater.hpp b/src/map/skills/thief/impactcrater.hpp
index 9cb8b18cf31..66e95006790 100644
--- a/src/map/skills/thief/impactcrater.hpp
+++ b/src/map/skills/thief/impactcrater.hpp
@@ -9,7 +9,6 @@ class SkillImpactCrater : public SkillImplRecursiveDamageSplash {
 public:
 	SkillImpactCrater();
 
-	void modifyDamageData(Damage& dmg, const block_list& src, const block_list& target, uint16 skill_lv) const override;
 	void calculateSkillRatio(const Damage *wd, const block_list *src, const block_list *target, uint16 skill_lv, int32 &skillratio, int32 mflag) const override;
 	void castendNoDamageId(block_list *src, block_list *target, uint16 skill_lv, t_tick tick, int32& flag) const override;
 };
diff --git a/src/map/skills/thief/shadowstab.cpp b/src/map/skills/thief/shadowstab.cpp
index 4a233d4c7dd..3f5bf607572 100644
--- a/src/map/skills/thief/shadowstab.cpp
+++ b/src/map/skills/thief/shadowstab.cpp
@@ -14,22 +14,13 @@ SkillShadowStab::SkillShadowStab() : WeaponSkillImpl(SHC_SHADOW_STAB) {
 void SkillShadowStab::calculateSkillRatio(const Damage *wd, const block_list *src, const block_list *target, uint16 skill_lv, int32 &skillratio, int32 mflag) const {
 	const status_data* sstatus = status_get_status_data(*src);
 
-	skillratio += -100 + 550 * skill_lv;
-	skillratio += 5 * sstatus->pow;
-
-	if (wd->miscflag & SKILL_ALTDMG_FLAG) {
-		skillratio += 100 * skill_lv + 2 * sstatus->pow;
-	}
+	skillratio += -100 + 650 * skill_lv;
+	skillratio += 5 * sstatus->pow;	// TODO : check pow ratio
 
 	RE_LVL_DMOD(100);
 }
 
 void SkillShadowStab::castendDamageId(block_list *src, block_list *target, uint16 skill_lv, t_tick tick, int32& flag) const {
-	status_change *sc = status_get_sc(src);
-
-	if (sc && sc->getSCE(SC_CLOAKINGEXCEED))
-		flag |= SKILL_ALTDMG_FLAG;
-
 	status_change_end(src, SC_CLOAKING);
 	status_change_end(src, SC_CLOAKINGEXCEED);