Pioneer Challenger Decks 2021

Each set’s pauper-legal cards bucketed by competitive MTGO play over the last 24 months (Challenges weighted 2×, Leagues 1×):

• Staple — appears in ≥10% of decks that could run it
• Playable — appears in ≥2%
• Fringe — appears in ≥0.5%
• Unplayed — no tournament appearances in the window

Avg play %is the mean presence rate across all of the set’s pauper-legal cards. Higher = the set’s cards see real play.

Pauper cards counts oracle-distinct cards. Excludes basic lands (regular, snow, Wastes) and cards from non-Pauper set types (tokens, Commander products, Alchemy, etc.).