Cara tenta usar esse script aqui:
local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_TARGETCASTERORTOPMOST, true)
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_DEATHDAMAGE)
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_MORTAREA)
setCombatParam(combat, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_SUDDENDEATH)
setCombatFormula(combat, COMBAT_FORMULA_LEVELMAGIC, -1, -100, -1, -100, 6, 6, 7, 8)
local condition = createConditionObject(CONDITION_CURSED)
setConditionParam(condition, CONDITION_PARAM_DELAYED, 1)
addDamageCondition(condition, 5, 2000, -60)
setCombatCondition(combat, condition)
function onCastSpell(cid, var)
return doCombat(cid, combat, var)
end
Abraços... 
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https://devmat.com.br/
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