Author's note: There are differences between the International and Japanese TCG, and this article will primarily focus on the International cards
Timetwister has appeared as a one-of in basically every Vintage archetype at some point or another, even if it has also been famously cut from basically every archetype at one point or another (at least temporarily)
Like with any Pokmon game, the first thing youll do in Pokmon TCG Online is to pick a deck
That effort began in 2016 with the plane of Zendikar, when the publisher released a free-to-download sourcebook for the popular RPG
Packages give your deck structure and can show when your deck has too much, or not enough, of something
A loose guide for grading whitening would be something like: No whitening - GM 10 1 to 2 spots of whitening - 9 Mint 3 spots of whitening - 8 Mint/Near Mint 4 or 5 spots of whitening - 7 Near Mint All 4 sides have whitening - 6 or below Color boarder cards have a hard time gem minting compared to cards with white/grey (think modern) borders since things like silvering/whitening are much less noticeable