pokemon quagsire card (26/109) (Stamped) [EX: Team Rocket Returns] holofoil pattern or surface detail) Quagsire | EX Unseen Forces

Theyre very valuable even if you dont use them in your decks, and often useful in another format

The Trainers are easier to find

Theres a chance theyre linked

But the harmonize mechanic is where it really gets wildyou can replay this from your graveyard by tapping a big creature to make it cheaper

As for what cards you want to collect to upgrade, Id recommend picking up 5,000 Years in the Future packs

Think of all the extra basic lands, the extra Seize the Spoils copies you pulled from Secrets of Strixhaven , the Goldvein Picks from Foundations , or the many commons, uncommons, rares, and mythics that dont see as much gameplay as the staples in various formats