Windows Manarune 1% failure

[slayzer]

Im not sure where to put it but:
how can i make it become like 1% chance for manarune (in this case frozen starlight) to fail and vanish just like normal rune?
here is my "manarune" script:

local t = {
	min = 1000,
	max = 1250,
	text = "Aaaah...",
	effect = CONST_ME_MAGIC_BLUE
}
function onUse(cid, item, fromPosition, itemEx, toPosition)
	if isPlayer(itemEx.uid) then
		doPlayerAddMana(itemEx.uid, math.random(t.min, t.max))
		doCreatureSay(itemEx.uid, t.text, TALKTYPE_ORANGE_1)
		doSendMagicEffect(toPosition, t.effect)
	else
		doPlayerSendCancel(cid, "You can only use this rune on players.")
	end
	return true
end

 

[slayzer]

@up Been too busy to try, but im hoping tha Rayeko's script work

Also, note that maybe the spellbook is already added by default for the "show spells" script. xD

allready tried to remove that funksjon on the spellbook hoping to get it work

EDIT: the script worked Rayeko Rep++ for you

 

[Znote]

With 1.5 sec exhaust. Easy to configure in the config panel.

Did also a bugfix. DoPlayerAddMana --> DoCreatureAddMana

local exhaust = createConditionObject(CONDITION_EXHAUST_HEAL)
setConditionParam(exhaust, CONDITION_PARAM_TICKS, _config.cooldown)

local _config = {
	min = 10000,
	max = 12500,
	text = "Mana (:",
	cancelText = "You are exhausted!",
	cooldown = 1500, -- Write in milli seconds, 0 to disable. 1500 = 1.5 seconds.
	effect = CONST_ME_MAGIC_BLUE
}
function onUse(cid, item, fromPosition, itemEx, toPosition)
	if(getCreatureCondition(cid, CONDITION_EXHAUST_HEAL) == FALSE) then
			doCreatureAddMana(cid, math.random(_config.min, _config.max))
			doCreatureSay(cid, _config.text, TALKTYPE_ORANGE_1)
			doSendMagicEffect(getCreaturePosition(cid), _config.effect)
		else
		doPlayerSendCancel(cid, _config.cancelText)
		end
		return true
end

Perhaps it does not work on that spellbook because it is already being loaded in movements.xml