Draft constraint — a rule limiting who you may draft, enforced at pick time.
Only 2013–17 players — win 10+ matches.
The 2013–17 era produced more 97+ cards than any other, so the ceiling is high and the win floor of 10 is fair. The scarce resource is the keeper: a specialist who also scores is the pick that gets hard to find late.
Every challenge is scored on the season, not the draft — finishing the roster is not a pass on its own. You get one attempt per day, and the board resets at midnight UTC.
Every player in the world got this challenge on these dates: