mega evolutions booster box lucario Pokémon TCG Evolution Elite Trainer (Pre-Order) – Paladin Cards Pokemon Mega Evolution Mega Lucario

3 - Opposition Agent Nothing can prepare you for the first time you get blown out by an Opposition Agent

PS: Im only counting traditional Filler Cards in my ramblings

Admittedly, this booster isn't very popular presently, but it does have over 95 cards to collect, and a few decent chase cards

Davros, Dalek Creator #192 Magic Doctor Who Keep track of your collection value over time

With all the Goad Seifer offers, its pretty easy to stop your opponents from interacting with you at all this way

Sometimes, the smartest buys are sets that are "cooling off." These are sets that have been out for a bit and whose prices have stabilized or even dipped