local storage = 44122 -- storage for cooldown
local sec = 30 -- 30 secconds cooldown

local condition = createConditionObject(CONDITION_ATTRIBUTES)
setConditionParam(condition, CONDITION_PARAM_STAT_MAGICLEVEL, 20)
setConditionParam(condition, CONDITION_PARAM_TICKS, 10 * 1000)

function onCastSpell(cid, var)
if getExhausted(cid, storage) then
setExhausted(cid, storage, sec)
    doSendMagicEffect(getCreaturePosition(cid), CONST_ME_HOLYAREA)
    return doAddCondition(cid, condition)
	else
	return doPlayerSendCancel(cid, 'You are exhausted Metamorphosis for: ' .. exhaustion.get(cid, storage) + 1 ..' seconds.') and false
end
return true
end