Alongside the standard mechanic that restricts players from opening packs or Wonder Picking or, now, trading too much without spending real world money, the feature was also introduced with an extra restriction called Trade Tokens
After the Duel Runner training, the player runs into Yusei, which seems to bring back ancient memories of a time where the player and Yusei were friends
First created for Kaladesh , the mechanic has most recently been dusted off with a few bangers in Modern Horizons 3
Sven Stolz I remember a couple years back when Snapcaster Mage was by far the best blue card and main game plan for many decks
In fact, the best strategy is usually a combination of good stats, abilities and Item cards that can synergize all together
PSA 10 graded 1999 Base Set Shadowless Charizard cards have sold for over $1 million at auction