Even if you don't use the Treasure token right away, just having that extra mana lets you cast spells ahead of your mana curve, and lets you take advantage of token and artifact synergies
Why Pokemon TCG Pocket Codes May Not Work If you wonder why your code isnt working, apart from the fact that there are only expired codes available now, there are a few common reasons why your code may fail: The code has expired The code was already used The code is single-use and belongs to another player You entered the wrong Support ID The code came from an unofficial source You confused similar-looking characters The most common mistake I stumbled upon is trying to use regular Pokemon TCG Live codes
There are only a half dozen cards at this mana value or less that let you discard as much as you want for free: Heir of Falkenrath, Olivia's Dragoon, Oona's Prowler, Patrol Hound, Putrid Imp, Seasoned Hallowblade, Stromkirk Condemned, Tireless Tribe, and Trained Pronghorn
Once you decide which cards you want to sell, you should find several sources you will use to sell them