Area of effect life drain

[Dexftw]

I was trying to mix some aoe spells with the life drain formula but its not working, the only life steal ability i could come up with is a single target, any idea if theres one for an aoe?

local formulaDrainHealth, percent = {
	min = 50 * 2 + 100 * 1,
	max = 40 * 2.5 + 200 * 1.5
}, 70
 
function onCastSpell(cid, var)
	local target = getCreatureTarget(cid)
	if not isCreature(target) then
		return not doPlayerSendDefaultCancel(cid, RETURNVALUE_NOTPOSSIBLE)
	end
 
	local drain = math.min(getCreatureHealth(target), math.random(formulaDrainHealth.min, formulaDrainHealth.max))
	doTargetCombatHealth(cid, target, COMBAT_LIFEDRAIN, -drain, -drain, CONST_ME_NONE)
	doCreatureAddHealth(cid, drain * (percent / 100))
	doSendDistanceShoot(getThingPos(target), getThingPos(cid), 30)
	return true
end

single-target heal ^ tried mixing it with the mass healing area 3x3 script but its not working, hope someone can help me with this epic spell