Des
If the ATK of a monster that attacks this monster is lower than the DEF of this card, destroy the attacking monster.
local s, id, o = GetID()
function s.initial_effect(c)
	--destroy
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_DAMAGE_STEP_END)
	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 aux.dsercon(e, tp, eg, ep, ev, re, r, rp)
		and Duel.GetAttackTarget() == e:GetHandler()
		and bit.band(e:GetHandler():GetBattlePosition(), POS_DEFENSE) ~= 0
		and Duel.GetAttacker():GetAttack() < e:GetHandler():GetDefense()
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return true
	end
	Duel.SetOperationInfo(0, CATEGORY_DESTROY, Duel.GetAttacker(), 1, 0, 0)
end
function s.operation(e, tp, eg, ep, ev, re, r, rp)
	local a = Duel.GetAttacker()
	if not a:IsRelateToBattle() then
		return
	end
	Duel.Destroy(a, REASON_EFFECT)
end


Des
If the ATK of a monster that attacks this monster is lower than the DEF of this card, destroy the attacking monster.
-- Des
local s, id, o = GetID()
function s.initial_effect(c)
	--destroy
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_F)
	e1:SetCode(EVENT_DAMAGE_STEP_END)
	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 aux.dsercon(e, tp, eg, ep, ev, re, r, rp)
		and Duel.GetAttackTarget() == e:GetHandler()
		and bit.band(e:GetHandler():GetBattlePosition(), POS_DEFENSE) ~= 0
		and Duel.GetAttacker():GetAttack() < e:GetHandler():GetDefense()
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return true
	end
	Duel.SetOperationInfo(0, CATEGORY_DESTROY, Duel.GetAttacker(), 1, 0, 0)
end
function s.operation(e, tp, eg, ep, ev, re, r, rp)
	local a = Duel.GetAttacker()
	if not a:IsRelateToBattle() then
		return
	end
	Duel.Destroy(a, REASON_EFFECT)
end

