Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When your opponent Special Summons a monster(s) (except during the Damage Step): You can discard this card and 1 Spell; destroy that monster(s). You can only use this effect of "Singularity Fiend" once per turn.
--特異点の悪魔
--Singularity Fiend
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Destroy a monster(s) Special Summoned by your opponent when that monster(s) is Special Summoned
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCondition(function(e,tp,eg,ep) return eg:IsExists(Card.IsSummonPlayer,1,nil,1-tp) end)
	e1:SetCost(s.descost)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
end
function s.descost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsDiscardable()
		and Duel.IsExistingMatchingCard(aux.AND(Card.IsSpell,Card.IsDiscardable),tp,LOCATION_HAND,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DISCARD)
	local g=Duel.SelectMatchingCard(tp,aux.AND(Card.IsSpell,Card.IsDiscardable),tp,LOCATION_HAND,0,1,1,nil)
	Duel.SendtoGrave(g+c,REASON_COST|REASON_DISCARD)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	local g=eg:Filter(Card.IsSummonPlayer,nil,1-tp):Match(Card.IsLocation,nil,LOCATION_MZONE)
	if chk==0 then return #g>0 end
	Duel.SetTargetCard(g)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,tp,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end