--シャドー・インパルス
--Shadow Impulse
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon 1 Synchro monster from the Extra Deck
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_TO_GRAVE)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.filter(c,e,tp)
	return c:IsLocation(LOCATION_GRAVE) and c:IsCanBeEffectTarget(e) and c:IsPreviousLocation(LOCATION_MZONE)
		and c:IsPreviousControler(tp) and c:IsReason(REASON_DESTROY) and c:IsReason(REASON_BATTLE|REASON_EFFECT)
		and c:IsType(TYPE_SYNCHRO) and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp,c)
end
function s.spfilter(c,e,tp,tc)
	return c:IsType(TYPE_SYNCHRO) and c:GetLevel()==tc:GetLevel()
		and c:GetRace()==tc:GetRace() and c:GetCode()~=tc:GetCode()
		and Duel.GetLocationCountFromEx(tp,tp,nil,c)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return eg:IsContains(chkc) and s.filter(chkc,e,tp) end
	if chk==0 then return eg:IsExists(s.filter,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	local g=eg:FilterSelect(tp,s.filter,1,1,nil,e,tp)
	Duel.SetTargetCard(g)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) or tc:IsFacedown() then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local sg=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,tc)
	if #sg>0 then
		Duel.SpecialSummon(sg,0,tp,tp,false,false,POS_FACEUP)
	end
end