--トロイメア・ケルベロス
--Knightmare Cerberus
local s,id=GetID()
function s.initial_effect(c)
	--link summon
	Link.AddProcedure(c,nil,2,2,s.lcheck)
	c:EnableReviveLimit()
	--Destroy monster
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.descon)
	e1:SetCost(s.descost)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--indes
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	e2:SetRange(LOCATION_MZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(s.indtg)
	e2:SetValue(1)
	c:RegisterEffect(e2)
end
function s.lcheck(g,lc,sumtype,tp)
	return g:CheckDifferentProperty(Card.GetCode,lc,sumtype,tp)
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsLinkSummoned()
end
function s.descost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
end
function s.desfilter(c)
	return c:IsSpecialSummoned() and c:GetSequence()<5
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE) and s.desfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.desfilter,tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,s.desfilter,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
	if e:GetHandler():GetMutualLinkedGroupCount()>0 then
		e:SetLabel(1)
	else
		e:SetLabel(0)
	end
	local cat=CATEGORY_DESTROY
	if e:GetLabel()==1 then cat=cat+CATEGORY_DRAW end
	e:SetCategory(cat)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) and Duel.Destroy(tc,REASON_EFFECT)~=0
		and e:GetLabel()==1 and Duel.IsPlayerCanDraw(tp,1)
		and Duel.SelectYesNo(tp,aux.Stringid(id,1)) then
		Duel.BreakEffect()
		Duel.Draw(tp,1,REASON_EFFECT)
	end
end
function s.indtg(e,c)
	return c:GetMutualLinkedGroupCount()>0
end