Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
[ Pendulum Effect ] During your Main Phase: You can add 1 face-up "D/D" Pendulum Monster from your Extra Deck to your hand. You can only use this effect of "D/D Savant Thomas" once per turn. ---------------------------------------- [ Monster Effect ] You can target 1 "D/D" card in your Pendulum Zone; destroy that card, and if you do, Special Summon 1 Level 8 "D/D/D" monster from your Deck in Defense Position, and if you do that, apply this effect for the rest of this turn: ● That monster's effects (if any) are negated, also any battle damage your opponent takes becomes halved. You can only use this effect of "D/D Savant Thomas" once per turn. * The above text is unofficial and describes the card's functionality in the OCG.
--DD魔導賢者トーマス
--D/D Savant Thomas
local s,id=GetID()
function s.initial_effect(c)
	--Pendulum summon
	Pendulum.AddProcedure(c)
	--Add to hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_PZONE)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	--Special Summon from the Deck
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_DESTROY+CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,{id,1})
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_DD,SET_DDD}
function s.thfilter(c)
	return c:IsFaceup() and c:IsSetCard(SET_DD) and c:IsType(TYPE_PENDULUM) and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_EXTRA,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_EXTRA)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_EXTRA,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end
function s.desfilter(c)
	return c:IsSetCard(SET_DD)
end
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_DDD) and c:GetLevel()==8 and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_PZONE) and chkc:IsControler(tp) and s.desfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.desfilter,tp,LOCATION_PZONE,0,1,nil)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_DECK,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,s.desfilter,tp,LOCATION_PZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) and Duel.Destroy(tc,REASON_EFFECT)~=0 then
		if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_DECK,0,1,1,nil,e,tp)
		local tc=g:GetFirst()
		if tc and Duel.SpecialSummonStep(tc,0,tp,tp,false,false,POS_FACEUP_DEFENSE) then
			local e1=Effect.CreateEffect(c)
			e1:SetType(EFFECT_TYPE_SINGLE)
			e1:SetCode(EFFECT_DISABLE)
			e1:SetReset(RESETS_STANDARD_PHASE_END)
			tc:RegisterEffect(e1)
			local e2=Effect.CreateEffect(c)
			e2:SetType(EFFECT_TYPE_SINGLE)
			e2:SetCode(EFFECT_DISABLE_EFFECT)
			e2:SetReset(RESETS_STANDARD_PHASE_END)
			tc:RegisterEffect(e2)
		end
	Duel.SpecialSummonComplete()
	end
	local e3=Effect.CreateEffect(e:GetHandler())
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetCode(EFFECT_CHANGE_BATTLE_DAMAGE)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetTargetRange(0,1)
	e3:SetValue(HALF_DAMAGE)
	e3:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e3,tp)
	aux.RegisterClientHint(e:GetHandler(),nil,tp,0,1,aux.Stringid(id,2),nil)
end