Paralyze with exhaustion.check

[Nightimarez]

Paralyze rune

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_TARGETCASTERORTOPMOST, true)
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_MAGIC_RED)

local condition = createConditionObject(CONDITION_PARALYZE)
setConditionParam(condition, CONDITION_PARAM_TICKS, 20000)
setConditionFormula(condition, -0.9, 0, -0.9, 0)
setCombatCondition(combat, condition)

function onCastSpell(cid, var)
	if(not doCombat(cid, combat, var)) then
		return false
	end

	doSendMagicEffect(getThingPosition(cid), CONST_ME_MAGIC_GREEN)
	return true
end

I want the paralyze rune to only work if your target has exhaustion id 1020.

if(isPlayer(cid)) and exhaustion.check(cid, 1020) then