Solved Rune condition problem

[Apoccalypse]

Hello guys,
I created rune which weakens health potions on my server but I have some problems about it.

Spoiler: Curse Rune.lua

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_EFFECT, 59)

local curse = createConditionObject(CONDITION_CURSED) -- CONST_ME_DRAWBLOOD
setConditionParam(curse, CONDITION_PARAM_DELAYED, 1)
addDamageCondition(curse, 1, 1000, -124)
addDamageCondition(curse, 1, 1000, -192)
addDamageCondition(curse, 1, 1000, -298)
addDamageCondition(curse, 1, 1000, -462)
setCombatCondition(combat, curse)

arr = {

{ 1 }

}

local area = createCombatArea(arr)
setCombatArea(combat, area)


function onCastSpell(cid, var)

local paradelay = 5000 --delay in ms-->

return doCombat(cid, combat, var), exhaustion.set(getCreatureTarget(cid), 30035, paradelay/1000)

end

I have the following problems:
1.The Rune only works when I have marked a player, otherwise the console returns creature not found and the storage 20035 is not set for the target.
2.The script should add four consecutive damages but it adds only two or three.
3.I would like to param object (it is a skull)) was in line with the direction of the target.So if the target is diracted to the north ,then the skull should be diracted also to the north and so on.

If anyone would take a look on it ,that would be great.

 

[Apoccalypse]

Solved by my own.
I used onUse function for the rune