Quarter Century Secret Rare cards include a holographic foil finish, gold foil name stamps and the 25th Anniversary watermark and theyre only available during the 25th anniversary celebratory period
(May 24th, 2017) Grey Stamp Theory (June 28th, 2017) Thick Vs Thin Stamp (August 16th, 2017) acebrens Collection (search term: thin) If you happen to know or have any 1st edition stamp variations not covered, please let me know (with pictures if possible)
Amass 4, mill four, deal 4, gain 4
Sure, you might not make a ton of money selling two Revised Volcanic Islands, maybe $50, but they are high-demand cards that are easy to move, require no sorting, and likely ship together, so all in all, you're making that $50 for very little work
That means most non-Foundations sets from 2023 and 2024 are the cards returning players should treat carefully
But for that, you can also destroy lands, and who doesnt love land destruction