Ring
During your opponent's turn: Target 1 face-up monster your opponent controls whose ATK is less than or equal to their LP; destroy that face-up monster, and if you do, take damage equal to its original ATK, then inflict damage to your opponent, equal to the damage you took. You can only activate 1 "Ring of Destruction" per turn.
local s, id, o = GetID()
function s.initial_effect(c)
	--Activate
	local e1 = Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DESTROY + CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0, TIMINGS_CHECK_MONSTER + TIMING_END_PHASE)
	e1:SetCountLimit(1, id + EFFECT_COUNT_CODE_OATH)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.condition(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetTurnPlayer() ~= tp
end
function s.filter(c, lp)
	return c:IsFaceup() and c:IsAttackBelow(lp)
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	local lp = Duel.GetLP(1 - tp)
	if chkc then
		return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1 - tp) and s.filter(chkc, lp)
	end
	if chk == 0 then
		return Duel.IsExistingTarget(s.filter, tp, 0, LOCATION_MZONE, 1, nil, lp)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_DESTROY)
	local g = Duel.SelectTarget(tp, s.filter, tp, 0, LOCATION_MZONE, 1, 1, nil, lp)
	Duel.SetOperationInfo(0, CATEGORY_DESTROY, g, 1, 0, 0)
	Duel.SetOperationInfo(0, CATEGORY_DAMAGE, nil, 0, PLAYER_ALL, 0)
end
function s.activate(e, tp, eg, ep, ev, re, r, rp)
	local tc = Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() and Duel.Destroy(tc, REASON_EFFECT) ~= 0 then
		local atk = tc:GetTextAttack()
		if atk < 0 then
			atk = 0
		end
		local val = Duel.Damage(tp, atk, REASON_EFFECT)
		if val > 0 and Duel.GetLP(tp) > 0 then
			Duel.BreakEffect()
			Duel.Damage(1 - tp, val, REASON_EFFECT)
		end
	end
end


Ring
During your opponent's turn: Target 1 face-up monster your opponent controls whose ATK is less than or equal to their LP; destroy that face-up monster, and if you do, take damage equal to its original ATK, then inflict damage to your opponent, equal to the damage you took. You can only activate 1 "Ring of Destruction" per turn.
-- Ring
local s, id, o = GetID()
function s.initial_effect(c)
	--Activate
	local e1 = Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DESTROY + CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0, TIMINGS_CHECK_MONSTER + TIMING_END_PHASE)
	e1:SetCountLimit(1, id + EFFECT_COUNT_CODE_OATH)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.condition(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetTurnPlayer() ~= tp
end
function s.filter(c, lp)
	return c:IsFaceup() and c:IsAttackBelow(lp)
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	local lp = Duel.GetLP(1 - tp)
	if chkc then
		return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1 - tp) and s.filter(chkc, lp)
	end
	if chk == 0 then
		return Duel.IsExistingTarget(s.filter, tp, 0, LOCATION_MZONE, 1, nil, lp)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_DESTROY)
	local g = Duel.SelectTarget(tp, s.filter, tp, 0, LOCATION_MZONE, 1, 1, nil, lp)
	Duel.SetOperationInfo(0, CATEGORY_DESTROY, g, 1, 0, 0)
	Duel.SetOperationInfo(0, CATEGORY_DAMAGE, nil, 0, PLAYER_ALL, 0)
end
function s.activate(e, tp, eg, ep, ev, re, r, rp)
	local tc = Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() and Duel.Destroy(tc, REASON_EFFECT) ~= 0 then
		local atk = tc:GetTextAttack()
		if atk < 0 then
			atk = 0
		end
		local val = Duel.Damage(tp, atk, REASON_EFFECT)
		if val > 0 and Duel.GetLP(tp) > 0 then
			Duel.BreakEffect()
			Duel.Damage(1 - tp, val, REASON_EFFECT)
		end
	end
end

