--Verglascent Whitefrost
local cid,id=GetID()
function cid.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id)
	e1:SetCondition(cid.atkcon)
	e1:SetOperation(cid.activate)
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e2:SetCode(EFFECT_DESTROY_REPLACE)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,id)
	e2:SetTarget(cid.reptg)
	e2:SetValue(cid.repval)
	e2:SetOperation(cid.repop)
	c:RegisterEffect(e2)
end
function cid.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsFaceup,tp,0,LOCATION_MZONE,nil)
	local tc=g:GetFirst()
	while tc do
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(-300)
		e1:SetReset(RESET_EVENT+RESETS_STANDARD)
		tc:RegisterEffect(e1)
		tc=g:GetNext()
	end
end
function cid.filter(c)
	return c:IsFaceup() and c:IsSetCard(0x1996)
end
function cid.filter2(c)
	return c:IsFaceup()
end
function cid.atkcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(cid.filter,tp,LOCATION_MZONE,0,1,nil) and Duel.IsExistingMatchingCard(cid.filter2,tp,0,LOCATION_MZONE,1,nil)
end
function cid.repfilter(c,tp)
    return c:IsFaceup() and c:IsSetCard(0x1996)
        and c:IsControler(tp) and (c:IsReason(REASON_BATTLE) or (c:IsReason(REASON_EFFECT) and c:GetReasonPlayer()==1-tp)) and not c:IsReason(REASON_REPLACE)
end
function cid.reptg(e,tp,eg,ep,ev,re,r,rp,chk)
    if chk==0 then return e:GetHandler():IsAbleToRemove() and eg:IsExists(cid.repfilter,1,nil,tp) end
    return Duel.SelectEffectYesNo(tp,e:GetHandler())
end
function cid.repval(e,c)
    return cid.repfilter(c,e:GetHandlerPlayer())
end
function cid.repop(e,tp,eg,ep,ev,re,r,rp)
    Duel.Remove(e:GetHandler(),POS_FACEUP,REASON_EFFECT)
end