--Crystal God Tistina
local s,id=GetID()
function s.initial_effect(c)
	--effect 1
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--effect 2
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_DESTROYED)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCountLimit(1,id+1)
	e2:SetCondition(s.condition)
	e2:SetTarget(s.target)
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return (c:IsStatus(STATUS_OPPO_BATTLE) or rp==1-tp) and c:IsPreviousControler(tp)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsCanTurnSet,tp,0,LOCATION_MZONE,1,nil) end
	local g=Duel.GetMatchingGroup(Card.IsCanTurnSet,tp,0,LOCATION_MZONE,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,g:GetCount(),0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsCanTurnSet,tp,0,LOCATION_MZONE,nil)
	if g:GetCount()>0 then
		Duel.ChangePosition(g,POS_FACEDOWN_DEFENSE)
		local g1=Duel.GetMatchingGroup(Card.IsFaceup,tp,0,LOCATION_ONFIELD,nil)
		if g1:GetCount()>0 and Duel.SelectYesNo(tp,aux.Stringid(id,1)) then
			Duel.BreakEffect()
			Duel.SendtoGrave(g1,REASON_EFFECT)
		end
	end
end
