Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn, if you Special Summon a DARK Synchro Monster from the Extra Deck (except during the Damage Step): You can target 1 of your "Blackwing" monsters, or "Black-Winged Dragon", that is banished or in your GY, with less ATK than that Special Summoned monster; Special Summon it. Once per turn, if a DARK monster(s) you control would be destroyed by battle or card effect, you can remove 1 Black Feather Counter from your field instead. * The above text is unofficial and describes the card's functionality in the OCG.
--黒羽の旋風
--Black Feather Whirlwind
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--Special Summon 1 monster that is banished or in the GY
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCountLimit(1)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
	--Replace destruction
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_FIELD)
	e3:SetCode(EFFECT_DESTROY_REPLACE)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1)
	e3:SetTarget(s.desreptg)
	e3:SetValue(s.desrepval)
	e3:SetOperation(s.desrepop)
	c:RegisterEffect(e3)
end
s.listed_names={CARD_BLACK_WINGED_DRAGON}
s.listed_series={SET_BLACKWING}
s.counter_list={COUNTER_FEATHER}
function s.spcfilter(c,tp)
	return c:IsFaceup() and c:IsSummonPlayer(tp) and c:IsAttribute(ATTRIBUTE_DARK)
		and c:IsType(TYPE_SYNCHRO) and c:IsSummonLocation(LOCATION_EXTRA)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.spcfilter,1,nil,tp)
end
function s.spfilter(c,e,tp,atk)
	return (c:IsSetCard(SET_BLACKWING) or c:IsCode(CARD_BLACK_WINGED_DRAGON)) and c:IsFaceup() and c:GetAttack()<atk
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local _,atk=eg:Filter(s.spcfilter,nil,tp):GetMaxGroup(Card.GetAttack)
	if not atk then atk=0 end
	if chkc then return chkc:IsLocation(LOCATION_GRAVE|LOCATION_REMOVED) and chkc:IsControler(tp) and s.spfilter(chkc,e,tp,atk) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE|LOCATION_REMOVED,0,1,nil,e,tp,atk) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE|LOCATION_REMOVED,0,1,1,nil,e,tp,atk)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if e:GetHandler():IsRelateToEffect(e) and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end
function s.repfilter(c,tp)
	return c:IsControler(tp) and c:IsAttribute(ATTRIBUTE_DARK) and c:IsLocation(LOCATION_MZONE) and c:IsFaceup()
		and c:IsReason(REASON_BATTLE|REASON_EFFECT) and not c:IsReason(REASON_REPLACE)
end
function s.desreptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return eg:IsExists(s.repfilter,1,nil,tp)
		and Duel.IsCanRemoveCounter(tp,1,0,COUNTER_FEATHER,1,REASON_EFFECT) end
	return Duel.SelectEffectYesNo(tp,c,96)
end
function s.desrepval(e,c)
	return s.repfilter(c,e:GetHandlerPlayer())
end
function s.desrepop(e,tp,eg,ep,ev,re,r,rp)
	Duel.RemoveCounter(tp,1,0,COUNTER_FEATHER,1,REASON_EFFECT|REASON_REPLACE)
end