Naturia
Once per turn, when your opponent's monster declares an attack: You can send the top card of your Deck to the GY, and if you do, negate that attack.
local s, id, o = GetID()
function s.initial_effect(c)
	--negate attack
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.condition(e, tp, eg, ep, ev, re, r, rp)
	return eg:GetFirst():GetControler() ~= tp
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsPlayerCanDiscardDeck(tp, 1)
	end
	Duel.SetOperationInfo(0, CATEGORY_DECKDES, nil, 0, tp, 1)
end
function s.operation(e, tp, eg, ep, ev, re, r, rp)
	Duel.DiscardDeck(tp, 1, REASON_EFFECT)
	Duel.NegateAttack()
end


Naturia
Once per turn, when your opponent's monster declares an attack: You can send the top card of your Deck to the GY, and if you do, negate that attack.
-- Naturia
local s, id, o = GetID()
function s.initial_effect(c)
	--negate attack
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.condition(e, tp, eg, ep, ev, re, r, rp)
	return eg:GetFirst():GetControler() ~= tp
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsPlayerCanDiscardDeck(tp, 1)
	end
	Duel.SetOperationInfo(0, CATEGORY_DECKDES, nil, 0, tp, 1)
end
function s.operation(e, tp, eg, ep, ev, re, r, rp)
	Duel.DiscardDeck(tp, 1, REASON_EFFECT)
	Duel.NegateAttack()
end

