Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
1 Rock monster + 1 Level 7 or higher monster Must first be Special Summoned with "Fossil Fusion". This card can make a second attack during each Battle Phase. If this card attacks a Defense Position monster, inflict piercing battle damage. During your opponent's turn (Quick Effect): You can target 1 monster in your opponent's GY; discard 1 card, and if you do, Special Summon that monster to your field. You can only use this effect of "Fossil Warrior Skull King" once per turn.
--古生代化石騎士 スカルキング
--Fossil Warrior Skull King
--Scripted by AlphaKretin
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,true,true,aux.FilterBoolFunctionEx(Card.IsRace,RACE_ROCK),aux.FilterBoolFunctionEx(Card.IsLevelAbove,7))
	--lizard check
	Auxiliary.addLizardCheck(c)
	--Special summon condition
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_SINGLE)
	e0:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE+EFFECT_FLAG_SINGLE_RANGE)
	e0:SetCode(EFFECT_SPSUMMON_CONDITION)
	e0:SetRange(LOCATION_EXTRA)
	e0:SetValue(aux.FossilLimit)
	c:RegisterEffect(e0)
	--Extra attack
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_EXTRA_ATTACK)
	e1:SetValue(1)
	c:RegisterEffect(e1)
	--Piercing damage
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_PIERCE)
	c:RegisterEffect(e2)
	--Special summon a target from the GY
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_HANDES)
	e3:SetType(EFFECT_TYPE_QUICK_O)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCode(EVENT_FREE_CHAIN)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetCountLimit(1,id)
	e3:SetCondition(s.spcon)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
s.listed_names={CARD_FOSSIL_FUSION}
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(1-tp)
end
function s.spfilter(c,e,tp)
	return c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP,tp)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(1-tp) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 
		and Duel.IsExistingTarget(s.spfilter,tp,0,LOCATION_GRAVE,1,nil,e,tp) 
		and Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil,REASON_EFFECT) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,0,LOCATION_GRAVE,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,tp,LOCATION_GRAVE)
	Duel.SetOperationInfo(0,CATEGORY_HANDES,nil,0,tp,1)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_EFFECT|REASON_DISCARD,nil,REASON_EFFECT)~=0
		and tc and tc:IsRelateToEffect(e) and Duel.GetLocationCount(tp,LOCATION_MZONE)>0 then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end