The Commander cards
we've watched people play.

Players using Playgroup Live import their decklists before a game and log card actions as they play. Each cast, zone change, and resolution is recorded as a real game event. Stats here are computed from those events, not from decklist scrapes or theorycrafting.

Card stats are recomputed every night at 03:00 UTC from the previous day's game events. Deep-dive narrative pages refresh when a card's underlying numbers drift by more than 10 percent, or when a card first crosses the threshold for a dedicated page.

A card earns a full breakdown page once it has appeared in at least 100 tracked Commander games. Below that bar the sample is too small to make honest claims. Every other card still resolves at this URL with the basic counts and a note that the deep dive is pending.

EDHREC ranks cards by how often they appear in public decklists. Playgroup.gg ranks by what actually happens when those decks get played. That means we can tell you things a decklist cannot: when cards get cast, how often they stick on the battlefield, and how win rate shifts when they resolve versus when they never leave the library.

"Win rate when cast" is the percentage of games a player won when this card resolved at least once. "Cast-vs-library delta" is the gap between that number and the win rate of games where the same card stayed in the library all game. A positive delta means casting the card correlates with winning, controlling for the deck.

Yes, the aggregate per-card stats are published under CC-BY 4.0. Link back to the relevant card page and you're good to go. The raw game events themselves are not public; the aggregates are what we publish.