Dark
Once per turn, after resolving a Spell Card that was activated during your opponent's Main Phase: You can target 1 Level 4 DARK monster in your Graveyard; Special Summon that target. This card must be face-up on the field to activate and to resolve this effect.
local s, id, o = GetID()
function s.initial_effect(c)
	--special summon
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET + EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_CHAINING)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
function s.spcon(e, tp, eg, ep, ev, re, r, rp)
	local ph = Duel.GetCurrentPhase()
	return Duel.GetTurnPlayer() ~= tp and (ph == PHASE_MAIN1 or ph == PHASE_MAIN2) and re:IsActiveType(TYPE_SPELL) and re:IsHasType(EFFECT_TYPE_ACTIVATE)
end
function s.filter(c, e, tp)
	return c:IsLevel(4) and c:IsAttribute(ATTRIBUTE_DARK) and c:IsCanBeSpecialSummoned(e, 0, tp, false, false)
end
function s.sptg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	if chkc then
		return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.filter(chkc, e, tp)
	end
	if chk == 0 then
		return Duel.GetLocationCount(tp, LOCATION_MZONE) > 0 and Duel.IsExistingTarget(s.filter, tp, LOCATION_GRAVE, 0, 1, nil, e, tp)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_SPSUMMON)
	local g = Duel.SelectTarget(tp, s.filter, tp, LOCATION_GRAVE, 0, 1, 1, nil, e, tp)
	Duel.SetOperationInfo(0, CATEGORY_SPECIAL_SUMMON, g, 1, 0, 0)
end
function s.spop(e, tp, eg, ep, ev, re, r, rp)
	local tc = Duel.GetFirstTarget()
	if e:GetHandler():IsRelateToEffect(e) and e:GetHandler():IsFaceup() and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc, 0, tp, tp, false, false, POS_FACEUP)
	end
end


Dark
Once per turn, after resolving a Spell Card that was activated during your opponent's Main Phase: You can target 1 Level 4 DARK monster in your Graveyard; Special Summon that target. This card must be face-up on the field to activate and to resolve this effect.
-- Dark
local s, id, o = GetID()
function s.initial_effect(c)
	--special summon
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET + EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_CHAINING)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
end
function s.spcon(e, tp, eg, ep, ev, re, r, rp)
	local ph = Duel.GetCurrentPhase()
	return Duel.GetTurnPlayer() ~= tp and (ph == PHASE_MAIN1 or ph == PHASE_MAIN2) and re:IsActiveType(TYPE_SPELL) and re:IsHasType(EFFECT_TYPE_ACTIVATE)
end
function s.filter(c, e, tp)
	return c:IsLevel(4) and c:IsAttribute(ATTRIBUTE_DARK) and c:IsCanBeSpecialSummoned(e, 0, tp, false, false)
end
function s.sptg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	if chkc then
		return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.filter(chkc, e, tp)
	end
	if chk == 0 then
		return Duel.GetLocationCount(tp, LOCATION_MZONE) > 0 and Duel.IsExistingTarget(s.filter, tp, LOCATION_GRAVE, 0, 1, nil, e, tp)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_SPSUMMON)
	local g = Duel.SelectTarget(tp, s.filter, tp, LOCATION_GRAVE, 0, 1, 1, nil, e, tp)
	Duel.SetOperationInfo(0, CATEGORY_SPECIAL_SUMMON, g, 1, 0, 0)
end
function s.spop(e, tp, eg, ep, ev, re, r, rp)
	local tc = Duel.GetFirstTarget()
	if e:GetHandler():IsRelateToEffect(e) and e:GetHandler():IsFaceup() and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc, 0, tp, tp, false, false, POS_FACEUP)
	end
end

