* remove non-existing prerelease printings of alternate art Teferi, Master of Time
* added 3 missing older promo editions: Junior Series Europe, Japan Junior Tournament, Junior APAC Series
* removed the edition tags and collector numbers temporarily from the arena export, until I find a solution to the buggy "what is the main edition of this card" issue, as it pertains to the Arena. should still be workable in the meantime without those
* added missing Biogenic Ooze to the Theros Promo Pack
* added many missing Front Jumpstart Theme cards
* added datestamped Scholar of the lost Trove Jumpstart promo
* added japanese resale promo Oran-Rief, the Vastwood to Media Inserts

Mausoleum Secrets exists as a promo pack rare. TCGP reports it as THB:

https://shop.tcgplayer.com/magic/promo-pack-theros-beyond-death/mausoleum-secrets

Just got my Secret lair bundle today, found that Karn, the Great Creator stained glass promo is missing. It is marked as #501 of the SLD set.

Ditto on Karn, the Great Creator, (foil), #501 P SLD * EN received in my “Can You Feel With a Heart of Steel?” bundle.

Ditto on Karn. I also opened an Ugin the Ineffable #502 P SLD * EN foil/stained glass planeswalker card.