Draft constraint — a rule limiting who you may draft, enforced at pick time.
Only 1990s players — win 55+ games.
The 1990s is the deepest era in the game, so the constraint costs you less than it looks. The real trap is positional — the decade is stacked with wings and centers, so lock down a true point guard early rather than assuming one will come around.
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: