--先史遺産クリスタル・ボーン
function c15941690.initial_effect(c)
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(c15941690.hspcon)
	e1:SetValue(SUMMON_VALUE_SELF)
	c:RegisterEffect(e1)
	--spsummon
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(15941690,0))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetCondition(c15941690.spcon)
	e2:SetTarget(c15941690.sptg)
	e2:SetOperation(c15941690.spop)
	c:RegisterEffect(e2)
end
function c15941690.hspcon(e,c)
	if c==nil then return true end
	return Duel.GetFieldGroupCount(c:GetControler(),LOCATION_MZONE,0)==0
		and	Duel.GetFieldGroupCount(c:GetControler(),0,LOCATION_MZONE)>0
		and Duel.GetLocationCount(c:GetControler(),LOCATION_MZONE)>0
end
function c15941690.spcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetSummonType()==SUMMON_TYPE_SPECIAL+SUMMON_VALUE_SELF
end
function c15941690.filter(c,e,tp)
	return c:IsSetCard(0x70) and not c:IsCode(15941690) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function c15941690.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(c15941690.filter,tp,LOCATION_GRAVE+LOCATION_HAND,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_GRAVE+LOCATION_HAND)
end
function c15941690.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(c15941690.filter),tp,LOCATION_GRAVE+LOCATION_HAND,0,1,1,nil,e,tp)
	if g:GetCount()>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end
