Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Special Summoned. To Tribute Summon this card, all Tributes must be WIND. Once per turn, during the End Phase: Each player takes 1000 damage, reduced by 500 for each Spell/Trap that player controls. This monster must be face-up on the field to activate and to resolve this effect. * The above text is unofficial and describes the card's functionality in the OCG.
--神鳥シムルグ
--Simorgh, Bird of Divinity
local s,id=GetID()
function s.initial_effect(c)
	--cannot special summon
	local e1=Effect.CreateEffect(c)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	c:RegisterEffect(e1)
	--tribute limit
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_TRIBUTE_LIMIT)
	e2:SetValue(s.tlimit)
	c:RegisterEffect(e2)
	--damage
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_DAMAGE)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetCode(EVENT_PHASE+PHASE_END)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1)
	e3:SetTarget(s.damtg)
	e3:SetOperation(s.damop)
	c:RegisterEffect(e3)
end
function s.tlimit(e,c)
	return not c:IsAttribute(ATTRIBUTE_WIND)
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,PLAYER_ALL,0)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local c1=Duel.GetMatchingGroupCount(Card.IsSpellTrap,tp,LOCATION_ONFIELD,0,nil)
	if c1<2 then
		Duel.Damage(tp,1000-c1*500,REASON_EFFECT)
	end
	local c2=Duel.GetMatchingGroupCount(Card.IsSpellTrap,1-tp,LOCATION_ONFIELD,0,nil)
	if c2<2 then
		Duel.Damage(1-tp,1000-c2*500,REASON_EFFECT)
	end
end