You should proxy cards that you dont have, cards that you own that are very expensive and youre trying to preserve, and ones that you intend for casual play or events that allows proxies
Now you've got two." Chandra Nalaar Number 460 Language English Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (2/7/2025) There is no main phase between the two additional combat phases
You might accidentally put a powerful non-Ally card to the bottom of your library
Card Text 2 [Inherited Effect] [All Turns] While your opponent has 8 or more cards in their hand, this Digimon gets +1000 DP
Here are the ones I like most now, but honestly you could make an argument for so many: Ho-Oh The colors, the pose, just such a clean artwork
Many cards in Core Sets have keywords summarized in rules text, but most other sets simply go by the keyword itself, saving room in the cards text box for other abilities and triggers