--バージェストマ・ピカイア
--Paleozoic Pikaia
local s,id=GetID()
function s.initial_effect(c)
	--Discard 1 "Paleozoic" card, draw 2
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DRAW)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--Special summon itself from GY as a monster
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetCode(EVENT_CHAINING)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_PALEOZOIC}
function s.filter(c)
	return c:IsSetCard(SET_PALEOZOIC) and c:IsDiscardable(REASON_EFFECT)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDraw(tp,2)
		and Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_HAND,0,1,e:GetHandler()) end
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,2)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.DiscardHand(tp,s.filter,1,1,REASON_EFFECT|REASON_DISCARD,nil)~=0 then
		Duel.BreakEffect()
		Duel.Draw(tp,2,REASON_EFFECT)
	end
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return re:IsTrapEffect() and re:IsHasType(EFFECT_TYPE_ACTIVATE)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:GetFlagEffect(id)==0 and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsPlayerCanSpecialSummonMonster(tp,id,SET_PALEOZOIC,TYPE_MONSTER|TYPE_NORMAL,1200,0,2,RACE_AQUA,ATTRIBUTE_WATER) end
	c:RegisterFlagEffect(id,RESET_CHAIN,0,1)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.IsPlayerCanSpecialSummonMonster(tp,id,SET_PALEOZOIC,TYPE_MONSTER|TYPE_NORMAL,1200,0,2,RACE_AQUA,ATTRIBUTE_WATER) then
		c:AddMonsterAttribute(TYPE_NORMAL)
		c:AssumeProperty(ASSUME_RACE,RACE_AQUA)
		Duel.SpecialSummonStep(c,0,tp,tp,true,false,POS_FACEUP)
		c:AddMonsterAttributeComplete()
		--Unaffected by monster effects
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(3101)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_IMMUNE_EFFECT)
		e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE+EFFECT_FLAG_CLIENT_HINT)
		e1:SetRange(LOCATION_MZONE)
		e1:SetValue(s.efilter)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e1)
		--Banish it if it leaves the field
		local e2=Effect.CreateEffect(c)
		e2:SetDescription(3300)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_LEAVE_FIELD_REDIRECT)
		e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CLIENT_HINT)
		e2:SetReset(RESET_EVENT|RESETS_REDIRECT)
		e2:SetValue(LOCATION_REMOVED)
		c:RegisterEffect(e2,true)
		Duel.SpecialSummonComplete()
	end
end
function s.efilter(e,re)
	return re:IsMonsterEffect()
end