Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 other "Zefra" card you control and 1 card your opponent controls; destroy them. If you have 2 "Zefra" cards in your Pendulum Zones, you can activate this card from your hand. You can only activate 1 "Zefra War" per turn.
--セフィラの星戦
--Zefra War
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER_E)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--act in hand
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_TRAP_ACT_IN_HAND)
	e2:SetCondition(s.handcon)
	e2:SetDescription(aux.Stringid(id,0))
	c:RegisterEffect(e2)
end
s.listed_series={SET_ZEFRA}
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local c=e:GetHandler()
	if chk==0 then return Duel.IsExistingTarget(aux.FaceupFilter(Card.IsSetCard,SET_ZEFRA),tp,LOCATION_ONFIELD,0,1,c)
		and Duel.IsExistingTarget(nil,tp,0,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g1=Duel.SelectTarget(tp,aux.FaceupFilter(Card.IsSetCard,SET_ZEFRA),tp,LOCATION_ONFIELD,0,1,1,c)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g2=Duel.SelectTarget(tp,nil,tp,0,LOCATION_ONFIELD,1,1,nil)
	g1:Merge(g2)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g1,2,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end
function s.handcon(e)
	return Duel.IsExistingMatchingCard(Card.IsSetCard,e:GetHandlerPlayer(),LOCATION_PZONE,0,2,nil,SET_ZEFRA)
end