local percent = 0.40 -- = 40%

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_HEALING)
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_BLUE)
setCombatParam(combat, COMBAT_PARAM_AGGRESSIVE, false)
setCombatParam(combat, COMBAT_PARAM_DISPEL, CONDITION_PARALYZE)
function onGetFormulaValues(cid, level, maglevel)
	doCreatureAddPercentHPMana(cid, percent, 0, true)
end
setCombatCallback(combat, CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValues")

function onCastSpell(cid, var)
	return doCombat(cid, combat, var)
end