Stamped (Missing Black Triangle) booster packs that I have come across are within TCAs Collection - here is a link to one of them listed on eBay: www.ebay.com/itm/1x-SEALED-Base-Set-1st-Edition-ERROR-MISPRINT-Booster-Pack-ULTD-Pokemon-Cards-B-/311845810678?hash=item489b7571f6:g:a-MAAOSwnF9Y7lnJ In regards to the dark and light booster packs
place them face-up in their owners' Spell & Trap Zones as Continuous Spells
Once per turn, during the Main Phase, if you control no card in your Field Zone: You can activate 1 "Necrovalley" directly from your hand or GY
Buried Alive is a Uncommon, Sorcery card from the Magic The Gathering set Modern Horizons 3 (MTGSC-MH3-0273)
Plus, each Play Booster Box contains a 2-card First Place Box Topper
Enter this planeswalker who is five mana but a rough triple red though for a 5-loyalty lady who can +1 to make three mana for ramping, but just for your instant/sorcery spells, so your burn stuff and dig stuff like Big Score