Local lvlcrit = 48913
Local multiplier = 3.5
Local effect = 2 --- effect that will leave the player / creature taking the critical

Function onStatsChange (cid, attacker, type, combat, value)
If type == STATSCHANGE_HEALTHLOSS or type == STATSCHANGE_MANALOSS and isCreature (attacker) then
If (getPlayerStorageValue (attacker, lvlcrit) * 3)> = math.random (0,1000) then
Damage = math.ceil (value * (multiplier))
DoTargetCombatHealth (attacker, cid, combat, -dano, -dano, 255)
DoSendAnimatedText (getCreaturePos (attacker), "CRITICAL !!", 22)
DoSendMagicEffect (getCreaturePos (attacker), effect)
Return false
End
End
Return true
End