name: Subterror
card_text: During either player's turn, when your opponent activates a card or effect that targets exactly 1 Set monster you control (and no other cards), or when a Set monster you control is targeted for an attack by an opponent's monster: You can send this card from your hand or face-up from your field to the Graveyard, then target another monster you control that would be an appropriate target; that card/effect/attack now targets the new target. While you control a Set monster, this card cannot be destroyed by battle or card effects.
lua: local s, id, o = GetID()
  function s.initial_effect(c)
  	--replace
  	local e1 = Effect.CreateEffect(c)
  	e1:SetDescription(aux.Stringid(id, 0))
  	e1:SetType(EFFECT_TYPE_QUICK_O)
  	e1:SetCode(EVENT_BE_BATTLE_TARGET)
  	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
  	e1:SetRange(LOCATION_HAND + LOCATION_MZONE)
  	e1:SetCost(s.ccost)
  	e1:SetTarget(s.cbtg)
  	e1:SetOperation(s.cbop)
  	c:RegisterEffect(e1)
  	local e2 = Effect.CreateEffect(c)
  	e2:SetDescription(aux.Stringid(id, 1))
  	e2:SetType(EFFECT_TYPE_QUICK_O)
  	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
  	e2:SetCode(EVENT_CHAINING)
  	e2:SetRange(LOCATION_HAND + LOCATION_MZONE)
  	e2:SetCondition(s.cecon)
  	e2:SetCost(s.ccost)
  	e2:SetTarget(s.cetg)
  	e2:SetOperation(s.ceop)
  	c:RegisterEffect(e2)
  	--indes
  	local e3 = Effect.CreateEffect(c)
  	e3:SetType(EFFECT_TYPE_SINGLE)
  	e3:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
  	e3:SetRange(LOCATION_MZONE)
  	e3:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
  	e3:SetCondition(s.indcon)
  	e3:SetValue(1)
  	c:RegisterEffect(e3)
  	local e4 = e3:Clone()
  	e4:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
  	c:RegisterEffect(e4)
  end
  function s.ccost(e, tp, eg, ep, ev, re, r, rp, chk)
  	if chk == 0 then
  		return e:GetHandler():IsAbleToGraveAsCost()
  	end
  	Duel.SendtoGrave(e:GetHandler(), REASON_COST)
  end
  function s.cbfilter(c, e)
  	return c:IsCanBeEffectTarget(e)
  end
  function s.cbtg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
  	if chkc then
  		return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.cbfilter(chkc, e)
  	end
  	local ag = Duel.GetAttacker():GetAttackableTarget()
  	local at = Duel.GetAttackTarget()
  	ag:RemoveCard(at)
  	if chk == 0 then
  		return Duel.GetAttacker():IsControler(1 - tp) and at:IsControler(tp) and at:IsFacedown() and ag:IsExists(s.cbfilter, 1, e:GetHandler(), e)
  	end
  	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_TARGET)
  	local g = ag:FilterSelect(tp, s.cbfilter, 1, 1, e:GetHandler(), e)
  	Duel.SetTargetCard(g)
  end
  function s.cbop(e, tp, eg, ep, ev, re, r, rp)
  	local tc = Duel.GetFirstTarget()
  	if tc:IsRelateToEffect(e) and not Duel.GetAttacker():IsImmuneToEffect(e) then
  		Duel.ChangeAttackTarget(tc)
  	end
  end
  function s.cecon(e, tp, eg, ep, ev, re, r, rp)
  	if e == re or rp ~= 1 - tp or not re:IsHasProperty(EFFECT_FLAG_CARD_TARGET) then
  		return false
  	end
  	local g = Duel.GetChainInfo(ev, CHAININFO_TARGET_CARDS)
  	if not g or g:GetCount() ~= 1 then
  		return false
  	end
  	local tc = g:GetFirst()
  	e:SetLabelObject(tc)
  	return tc:IsLocation(LOCATION_MZONE) and tc:IsFacedown()
  end
  function s.cefilter(c, ct, oc)
  	return oc ~= c and Duel.CheckChainTarget(ct, c)
  end
  function s.cetg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
  	if chkc then
  		return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.cefilter(chkc, ev, e:GetHandler())
  	end
  	if chk == 0 then
  		return Duel.IsExistingTarget(s.cefilter, tp, LOCATION_MZONE, 0, 1, e:GetLabelObject(), ev, e:GetHandler())
  	end
  	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_TARGET)
  	Duel.SelectTarget(tp, s.cefilter, tp, LOCATION_MZONE, 0, 1, 1, e:GetLabelObject(), ev, e:GetHandler())
  end
  function s.ceop(e, tp, eg, ep, ev, re, r, rp)
  	local tc = Duel.GetFirstTarget()
  	if tc:IsRelateToEffect(e) then
  		Duel.ChangeTargetCard(ev, Group.FromCards(tc))
  	end
  end
  function s.indcon(e)
  	return Duel.IsExistingMatchingCard(Card.IsFacedown, e:GetHandlerPlayer(), LOCATION_MZONE, 0, 1, nil)
  end
  
  
source_text: Subterror
  During either player's turn, when your opponent activates a card or effect that targets exactly 1 Set monster you control (and no other cards), or when a Set monster you control is targeted for an attack by an opponent's monster: You can send this card from your hand or face-up from your field to the Graveyard, then target another monster you control that would be an appropriate target; that card/effect/attack now targets the new target. While you control a Set monster, this card cannot be destroyed by battle or card effects.
target_text: -- Subterror
  local s, id, o = GetID()
  function s.initial_effect(c)
  	--replace
  	local e1 = Effect.CreateEffect(c)
  	e1:SetDescription(aux.Stringid(id, 0))
  	e1:SetType(EFFECT_TYPE_QUICK_O)
  	e1:SetCode(EVENT_BE_BATTLE_TARGET)
  	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
  	e1:SetRange(LOCATION_HAND + LOCATION_MZONE)
  	e1:SetCost(s.ccost)
  	e1:SetTarget(s.cbtg)
  	e1:SetOperation(s.cbop)
  	c:RegisterEffect(e1)
  	local e2 = Effect.CreateEffect(c)
  	e2:SetDescription(aux.Stringid(id, 1))
  	e2:SetType(EFFECT_TYPE_QUICK_O)
  	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
  	e2:SetCode(EVENT_CHAINING)
  	e2:SetRange(LOCATION_HAND + LOCATION_MZONE)
  	e2:SetCondition(s.cecon)
  	e2:SetCost(s.ccost)
  	e2:SetTarget(s.cetg)
  	e2:SetOperation(s.ceop)
  	c:RegisterEffect(e2)
  	--indes
  	local e3 = Effect.CreateEffect(c)
  	e3:SetType(EFFECT_TYPE_SINGLE)
  	e3:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
  	e3:SetRange(LOCATION_MZONE)
  	e3:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
  	e3:SetCondition(s.indcon)
  	e3:SetValue(1)
  	c:RegisterEffect(e3)
  	local e4 = e3:Clone()
  	e4:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
  	c:RegisterEffect(e4)
  end
  function s.ccost(e, tp, eg, ep, ev, re, r, rp, chk)
  	if chk == 0 then
  		return e:GetHandler():IsAbleToGraveAsCost()
  	end
  	Duel.SendtoGrave(e:GetHandler(), REASON_COST)
  end
  function s.cbfilter(c, e)
  	return c:IsCanBeEffectTarget(e)
  end
  function s.cbtg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
  	if chkc then
  		return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.cbfilter(chkc, e)
  	end
  	local ag = Duel.GetAttacker():GetAttackableTarget()
  	local at = Duel.GetAttackTarget()
  	ag:RemoveCard(at)
  	if chk == 0 then
  		return Duel.GetAttacker():IsControler(1 - tp) and at:IsControler(tp) and at:IsFacedown() and ag:IsExists(s.cbfilter, 1, e:GetHandler(), e)
  	end
  	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_TARGET)
  	local g = ag:FilterSelect(tp, s.cbfilter, 1, 1, e:GetHandler(), e)
  	Duel.SetTargetCard(g)
  end
  function s.cbop(e, tp, eg, ep, ev, re, r, rp)
  	local tc = Duel.GetFirstTarget()
  	if tc:IsRelateToEffect(e) and not Duel.GetAttacker():IsImmuneToEffect(e) then
  		Duel.ChangeAttackTarget(tc)
  	end
  end
  function s.cecon(e, tp, eg, ep, ev, re, r, rp)
  	if e == re or rp ~= 1 - tp or not re:IsHasProperty(EFFECT_FLAG_CARD_TARGET) then
  		return false
  	end
  	local g = Duel.GetChainInfo(ev, CHAININFO_TARGET_CARDS)
  	if not g or g:GetCount() ~= 1 then
  		return false
  	end
  	local tc = g:GetFirst()
  	e:SetLabelObject(tc)
  	return tc:IsLocation(LOCATION_MZONE) and tc:IsFacedown()
  end
  function s.cefilter(c, ct, oc)
  	return oc ~= c and Duel.CheckChainTarget(ct, c)
  end
  function s.cetg(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
  	if chkc then
  		return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.cefilter(chkc, ev, e:GetHandler())
  	end
  	if chk == 0 then
  		return Duel.IsExistingTarget(s.cefilter, tp, LOCATION_MZONE, 0, 1, e:GetLabelObject(), ev, e:GetHandler())
  	end
  	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_TARGET)
  	Duel.SelectTarget(tp, s.cefilter, tp, LOCATION_MZONE, 0, 1, 1, e:GetLabelObject(), ev, e:GetHandler())
  end
  function s.ceop(e, tp, eg, ep, ev, re, r, rp)
  	local tc = Duel.GetFirstTarget()
  	if tc:IsRelateToEffect(e) then
  		Duel.ChangeTargetCard(ev, Group.FromCards(tc))
  	end
  end
  function s.indcon(e)
  	return Duel.IsExistingMatchingCard(Card.IsFacedown, e:GetHandlerPlayer(), LOCATION_MZONE, 0, 1, nil)
  end
  
  