name: Wall
card_text: When an opponent's monster declares an attack: All Attack Position monsters your opponent currently controls lose 800 ATK for each monster they control.
lua: local s, id, o = GetID()
  function s.initial_effect(c)
  	--Activate
  	local e1 = Effect.CreateEffect(c)
  	e1:SetType(EFFECT_TYPE_ACTIVATE)
  	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
  	e1:SetCondition(s.condition)
  	e1:SetTarget(s.target)
  	e1:SetOperation(s.activate)
  	c:RegisterEffect(e1)
  end
  function s.condition(e, tp, eg, ep, ev, re, r, rp)
  	return Duel.GetAttacker():IsControler(1 - tp)
  end
  function s.filter(c)
  	return c:IsPosition(POS_FACEUP_ATTACK)
  end
  function s.target(e, tp, eg, ep, ev, re, r, rp, chk)
  	if chk == 0 then
  		return Duel.IsExistingMatchingCard(s.filter, tp, 0, LOCATION_MZONE, 1, nil)
  	end
  end
  function s.activate(e, tp, eg, ep, ev, re, r, rp)
  	local g = Duel.GetMatchingGroup(s.filter, tp, 0, LOCATION_MZONE, nil)
  	if g:GetCount() == 0 then
  		return
  	end
  	local atk = Duel.GetFieldGroupCount(tp, 0, LOCATION_MZONE) * 800
  	local tc = g:GetFirst()
  	while tc do
  		local e1 = Effect.CreateEffect(e:GetHandler())
  		e1:SetType(EFFECT_TYPE_SINGLE)
  		e1:SetCode(EFFECT_UPDATE_ATTACK)
  		e1:SetValue(-atk)
  		e1:SetReset(RESET_EVENT + RESETS_STANDARD)
  		tc:RegisterEffect(e1)
  		tc = g:GetNext()
  	end
  end
  
  
source_text: Wall
  When an opponent's monster declares an attack: All Attack Position monsters your opponent currently controls lose 800 ATK for each monster they control.
target_text: -- Wall
  local s, id, o = GetID()
  function s.initial_effect(c)
  	--Activate
  	local e1 = Effect.CreateEffect(c)
  	e1:SetType(EFFECT_TYPE_ACTIVATE)
  	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
  	e1:SetCondition(s.condition)
  	e1:SetTarget(s.target)
  	e1:SetOperation(s.activate)
  	c:RegisterEffect(e1)
  end
  function s.condition(e, tp, eg, ep, ev, re, r, rp)
  	return Duel.GetAttacker():IsControler(1 - tp)
  end
  function s.filter(c)
  	return c:IsPosition(POS_FACEUP_ATTACK)
  end
  function s.target(e, tp, eg, ep, ev, re, r, rp, chk)
  	if chk == 0 then
  		return Duel.IsExistingMatchingCard(s.filter, tp, 0, LOCATION_MZONE, 1, nil)
  	end
  end
  function s.activate(e, tp, eg, ep, ev, re, r, rp)
  	local g = Duel.GetMatchingGroup(s.filter, tp, 0, LOCATION_MZONE, nil)
  	if g:GetCount() == 0 then
  		return
  	end
  	local atk = Duel.GetFieldGroupCount(tp, 0, LOCATION_MZONE) * 800
  	local tc = g:GetFirst()
  	while tc do
  		local e1 = Effect.CreateEffect(e:GetHandler())
  		e1:SetType(EFFECT_TYPE_SINGLE)
  		e1:SetCode(EFFECT_UPDATE_ATTACK)
  		e1:SetValue(-atk)
  		e1:SetReset(RESET_EVENT + RESETS_STANDARD)
  		tc:RegisterEffect(e1)
  		tc = g:GetNext()
  	end
  end
  
  