Goldfishing a deck, playing it against nobody, tells you its best case. A tournament is the opposite of a best case. Between the two sits a practice partner that plays real defence, and that is what an Expert bot is for: it blocks with the right Blocker, counters when one card closes the gap, uses its leader ability when it pays, and never leaves DON!! idle.
The five tests
- The curve. Play five games and note every turn you ended with DON!! unspent. Two or more per game means the curve is wrong, not your luck.
- The Blocker count. If the bot's aggro lists take you to 2 Life by turn 4 in most games, you need more early Blockers.
- The finisher. Count games where you had lethal on board and failed to see it. The bot calculates lethal exactly; learn from how it commits.
- The mirror. Set the bot to your own leader. If you cannot beat your own list, someone at the event will play it better than you.
- The meta. Run the top two leaders from the tier list. Those are the decks you will face in rounds one and two.
A bot that defends correctly is worth ten opponents who do not.

Deck Builder with legality checks, meta decks, and Practice Arena with real card effects.
What the bot will not teach you
Reads. A bot does not bluff a Counter it does not have, and it does not tilt after losing a Life race. Those are human skills, and they come from human games. Use the bot to make the mechanics automatic so that at the table you can spend your attention on the person across from you.
Practice Arena and the Expert bot are free in the MugiPocket app.

