Need help with coding a custom Lavalval Chain Errata

[zde829]

--Lavalval Chain (Errata)
local eX=Effect.CreateEffect©
-- Send Card from Deck to GY
local eX=Effect.CreateEffect©
eA:SetType(EFFECT_TYPE_X)
eA:SetDescription(aux.Stringid(XXXX,n))*
eA:SetCategory(CATEGORY_X)
eA:SetCode(EFFECT_X)
eA:SetRange(LOCATION_X)
eA:SetCountLimit(1, XXXXXXXX)
eA:SetTargetRange(LOCATION_X)
eA:SetProperty(EFFECT_FLAG_DELAY)
eX:SetCategory
eX:SetValue(V)
c:RegisterEffect(eA)

local eX=Effect.CreateEffect©
-- Place Monster on top of Deck
local eX=Effect.CreateEffect©
eA:SetType(EFFECT_TYPE_X)
eA:SetDescription(aux.Stringid(XXXX,n))*
eA:SetCategory(CATEGORY_X)
eA:SetCode(EFFECT_X)
eA:SetRange(LOCATION_X)
eA:SetCountLimit(R, XXXXXXXX)
eA:SetTargetRange(LOCATION_X)
eA:SetProperty(EFFECT_FLAG_DELAY)
eX:SetCategory
eX:SetValue(V)
c:RegisterEffect(eA)

eA:SetCountLimit(1, 34086407)
function c34086407.xyzfilter©
return Duel.GetFlagEffect(c:GetControler(),34086407)==0 and c:IsSetCard(0x39)
    aux.AddXyzProcedure(c,c34086407.xyzfilter,4,2)
end

The custom Errata reads:

"2 Level 4 "Laval" monsters
Once per turn: You can detach 1 Xyz Material from this card to activate 1 of these effects;
●Send 1 card from your Deck to the Graveyard.
●Choose 1 monster from your Deck and place it on top of your Deck.
You can only activate an effect of "Lavalval Chain" once per turn."

[Zamazenta the OS-Tan Fan]

Why not just make a new card instead of ruining the original, also I don't know how to help with that since I'm not a programmer also cool you program.