Does this katar exist on our server yet?

2 slots
atk: 120
required level: 50
weapon level: 3
wearable only by assassin cross
A katar glimmering with dark light. Appears to require considerable power to wield.
Increases damage when using skill Grimtooth by 10%.
When performing a physical melee attack, there is a small chance of casting Sonic Blow level 1, or the highest level the player knows.
item script:
{ bonus2 bSkillAtk,"AS_GRIMTOOTH",10; if(getskilllv("AS_SONICBLOW")) { bonus3 bAutoSpell,"AS_SONICBLOW",getskilllv("AS_SONICBLOW"),5; }else{ bonus3 bAutoSpell,"AS_SONICBLOW",1,5; } },{},{}
Dropped by eremes normal monster.
Just wanted to know.