I dont see Edge ethernities in deckbox
facetofacegames.com/fr/products/sliver-overlord-128-borderless-special-guests-non-foil .
I check the special guest also and i dont see my silver overload in the list.

My english is bad so i use chatgpt :
t looks like you’re not seeing Sliver Overlord (Showcase / Borderless) from the Edge of Eternities: Special Guests set in your Deckbox collection or in their guest list. Let’s clarify:

What’s going on:
Sliver Overlord (SPG‑128) was recently reprinted in Edge of Eternities as part of the Special Guests series, with stunning retro‑sci‑fi artwork in both Showcase and Borderless variants
YouTube
Wargamer
Spankys Card Shop
gamenerdz.com
scryfall.com

It is a rare card (not mythic), unlike some previews mistakenly listed
tcgadvance.com
.

It is indeed listed as card number 128 in the set, and confirmed by Scryfall, TCGplayer, Card Kingdom, and other retailers
scryfall.com
MTGStocks


Why you don’t see it yet
Deckbox may not yet include it in their spoiler lists or database updates for Special Guests / Edge of Eternities. These are brand-new issues and may take time to enter their indexed sets or to update inventories.

If you checked the official “special guest” artist roster, they may have omitted your variant or simply not mapped yours to your user account yet.

Deckbox’s naming conventions might differ—sometimes using only “Sliver Overlord (Borderless)” or abbreviating set names.
What to do next
Here’s how to troubleshoot:

Inside Deckbox, try searching by “Sliver Overlord SPG‑128” or “Edge of Eternities Special Guests” instead of just “Sliver Overlord” or filtering by Special Guests set.

If it's really missing, contact Deckbox support and mention that the card SPG‑128 (Edge of Eternities: Special Guests – Borderless/Showcase) exists and should be in the database—use Scryfall or TCG Advance as references
Facebook

cardgamebase.com
cardsphere.com
cardgamebase.com
scryfall.com
starcitygames.com


It may not appear in official WOTC source lists yet, but community trackers like MTGStocks, Card Kingdom, Spanky’s shop, TCG Advance, and Scryfall already have it
eBay
MTGStocks
tcgadvance.com

Summary Table
Variant Set Card Number Printing Type
Sliver Overlord Edge of Eternities SPG #128 Showcase / Borderless

I think you are correct that Special Guests have just not been updated yet. This should happen in the next week or so.