Your ideal start is turn 1 Brigette, grabbing some combination of Pikachus/Lillipups/Ditto/tech Basics depending both on the matchup and what Pokmon you actually started
No, the only restriction on Powerstone tokens is that you can't use their mana to cast a nonartifact spell
Hexproof and haste make commanders powerful, especially if they have activated abilities
Inside each Booster Pack you'll find the following breakdown of cards: 7 Common Rarity 3 Uncommon Rarity 1 Rare Rarity Guaranteed 1 Rare Rarity or higher Of the above cards, a Booster Pack will contain at least two Option cards, but there's no guarantee on acquiring any Digi-Egg or Tamer cards from a Booster Pack
If you want to unlock more cards, check out our guides on how to get more gems and how to get craft points in Yu-Gi-Oh Master Duel
Only 19 copies are said to currently exist, so it's no surprise they sell for such high amounts