c511000435.lua

--Golden Castle of Stromberg
--modified by GameMaster
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--Discard half deck
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE+EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_PHASE+PHASE_STANDBY)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCondition(s.condition103)
	e2:SetCountLimit(1)
	e2:SetOperation(s.mtop)
	c:RegisterEffect(e2)
	--special summon
	local e3=Effect.CreateEffect(c)
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetCode(EVENT_FREE_CHAIN)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_REPEAT)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1)
	e3:SetCondition(s.condition)
	e3:SetTarget(s.target)
	e3:SetOperation(s.operation)
	c:RegisterEffect(e3)
	--Cannot Normal Summon
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_FIELD)
	e4:SetRange(LOCATION_SZONE)
	e4:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e4:SetCode(EFFECT_CANNOT_SUMMON)
	e4:SetTargetRange(1,0)
	c:RegisterEffect(e4)
	--Opponent's monsters must attack
	local e5=Effect.CreateEffect(c)
	e5:SetType(EFFECT_TYPE_FIELD)
	e5:SetCode(EFFECT_MUST_ATTACK)
	e5:SetRange(LOCATION_SZONE)
	e5:SetTargetRange(0,LOCATION_MZONE)
	c:RegisterEffect(e5)
	--Destroy monsters
	local e6=Effect.CreateEffect(c)
	e6:SetCategory(CATEGORY_DESTROY)
	e6:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e6:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e6:SetRange(LOCATION_SZONE)
	e6:SetCode(EVENT_ATTACK_ANNOUNCE)
	e6:SetCondition(s.atkcon)
	e6:SetTarget(s.atktg)
	e6:SetOperation(s.atkop)
	c:RegisterEffect(e6)
	--indes
	local e7=Effect.CreateEffect(c)
	e7:SetType(EFFECT_TYPE_SINGLE)
	e7:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e7:SetRange(LOCATION_SZONE)
	e7:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e7:SetValue(s.indval)
	c:RegisterEffect(e7)
	--Cannot End
	local e8=Effect.CreateEffect(c)
	e8:SetType(EFFECT_TYPE_FIELD)
	e8:SetCode(EFFECT_CANNOT_EP)
	e8:SetRange(LOCATION_SZONE)
	e8:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e8:SetTargetRange(0,1)
	e8:SetCondition(s.batcon)
	c:RegisterEffect(e8)
end

function s.condition103(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetTurnPlayer()==tp
end

function s.costfilter(c)
	return c:IsAbleToGrave()
end
function s.mtop(e,tp,eg,ep,ev,re,r,rp)
	local g2=Duel.GetFieldGroupCount(1-tp,LOCATION_DECK,0)
if g2==0 or g2%2~=0 then Duel.Destroy(e:GetHandler(),REASON_RULE) return end 
local gc=Duel.GetMatchingGroup(s.costfilter,1-tp,LOCATION_DECK,0,nil):RandomSelect(1-tp,math.floor(g2/2))
Duel.SendtoGrave(gc,REASON_COST)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetTurnPlayer()==tp 
	and Duel.GetCurrentPhase()~=PHASE_DRAW 
	and Duel.GetCurrentPhase()~=PHASE_STANDBY
	and Duel.GetCurrentPhase()~=PHASE_BATTLE
	and Duel.GetCurrentPhase()~=PHASE_MAIN2
	and Duel.GetCurrentPhase()~=PHASE_END
end
function s.filter(c,e,tp)
	return c:GetLevel()<=4 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 chkc:IsControler(tp) and chkc:IsLocation(LOCATION_DECK) 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_DECK,0,1,nil,e,tp) end
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
local c=e:GetHandler()
local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_DECK,0,nil,e,tp)
	if #g>0 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g2=g:RandomSelect(tp,1):GetFirst()
		if Duel.SpecialSummon(g2,0,tp,tp,false,false,POS_FACEUP_ATTACK)==0 then return end
		c:SetCardTarget(g2)
		--Must Attack
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_MUST_ATTACK)
		g2:RegisterEffect(e2)
		local e3=Effect.CreateEffect(c)
		e3:SetType(EFFECT_TYPE_FIELD)
		e3:SetCode(EFFECT_CANNOT_EP)
		e3:SetRange(LOCATION_MZONE)
		e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
		e3:SetTargetRange(1,0)
		e3:SetCondition(s.becon)
		g2:RegisterEffect(e3)
		Duel.SpecialSummonComplete()
		end	
	end
function s.becon(e)
	return e:GetHandler():CanAttack()
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	return tp~=Duel.GetTurnPlayer()
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local tg=Duel.GetAttacker()
	if chkc then return chkc==tg end
	if chk==0 then return tg:IsOnField() and tg:IsDestructable() and tg:IsCanBeEffectTarget(e) end
	Duel.SetTargetCard(tg)
	local dam=tg:GetAttack()
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,tg,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,dam)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:CanAttack() and not tc:IsStatus(STATUS_ATTACK_CANCELED) then
		Duel.Destroy(tc,REASON_EFFECT)
		Duel.Damage(1-tp,tc:GetAttack()/2,REASON_EFFECT)
	end
end
function s.indval(e,re)
	return re:GetOwner():IsType(TYPE_MONSTER+TYPE_SPELL+TYPE_TRAP)
end
function s.batfilter(c)
	return c:CanAttack()
end
function s.batcon(e)
	return Duel.IsExistingMatchingCard(s.batfilter,tp,0,LOCATION_MZONE,1,nil)
end