Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 6 monsters This card gains 200 ATK and DEF for every DARK monster in either player's Graveyard. You can detach 1 Xyz Material from this card; each player sends the top 5 cards from their Deck to the Graveyard (or their entire Deck, if less than 5). You can only use this effect of "Pilgrim Reaper" once per turn.
--巡死神リーパー
--Pilgrim Reaper
local s,id=GetID()
function s.initial_effect(c)
	--xyz summon
	Xyz.AddProcedure(c,nil,6,2)
	c:EnableReviveLimit()
	--atk/def
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(s.value)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_UPDATE_DEFENSE)
	c:RegisterEffect(e2)
	--deckdes
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_DECKDES)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,id)
	e3:SetCost(Cost.DetachFromSelf(1))
	e3:SetTarget(s.target)
	e3:SetOperation(s.operation)
	c:RegisterEffect(e3)
end
function s.value(e,c)
	return Duel.GetMatchingGroupCount(Card.IsAttribute,0,LOCATION_GRAVE,LOCATION_GRAVE,nil,ATTRIBUTE_DARK)*200
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDiscardDeck(tp,5) and Duel.IsPlayerCanDiscardDeck(1-tp,5) end
	Duel.SetOperationInfo(0,CATEGORY_DECKDES,nil,0,PLAYER_ALL,5)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local g1=Duel.GetDecktopGroup(tp,5)
	local g2=Duel.GetDecktopGroup(1-tp,5)
	g1:Merge(g2)
	Duel.DisableShuffleCheck()
	Duel.SendtoGrave(g1,REASON_EFFECT)
end