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Great Hall of the Biblioplex card art
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Great Hall of the Biblioplex

Land · Secrets of Strixhaven (SOS)
Times Brought
209
Decks Running
91
In Decks
—
Decklist Inclusion
—
Format

Showing 1v1 (duel) data only. 1v1 is a different format from multiplayer Commander, so these numbers are not comparable.

Card text
Great Hall of the Biblioplex card

Great Hall of the Biblioplex

Land
{T}: Add {C}. {T}, Pay 1 life: Add one mana of any color. Spend this mana only to cast an instant or sorcery spell. {5}: If this land isn't a creature, it becomes a 2/4 Wizard creature with "Whenever you cast an instant or sorcery spell, this creature gets +1/+0 until end of turn." It's still a land.
Secrets of Strixhaven (SOS) · Rare · Illustrated by Constantin Marin

Final zone distribution

79 instances
19.0%
Library
59.5%
Battlefield
10.1%
Graveyard
1.3%
Exile

Commanders that played this card

in tracked games

The "good card" funnel

275 brought · 86 players
Brought to game
275
Ever drawn
74
Reached battlefield
48
Still on board at game end
47

Once cast, 98% of this card is still on the battlefield at game end. This reflects how often it survives removal, not just whether it's a permanent.

≥ -4.0pp

Players who cast this card win 23% of the time (n=41) , vs 18% when it never left the library (n=119).

When players drew this card but left it in hand, they won 13% (n=15).

Read this as correlation, not as the card's contribution. Casting a card means you lived long enough to cast it, so this gap widens with mana value across every card we track.

Observed gap +4.9pp; 95% confidence interval -4.0pp to +13.8pp. Correlational, not causal: powerful payoffs also get cast more often in games you are already winning.

First-cast turn

n=48
21%
T1
13%
T2
10%
T3
23%
T4
15%
T5
15%
T6-9
4%
T10+
Median 4.0 P25 2 · P75 5 · max 10
Cast same turn as drawn 55%

Frequently Asked

Why isn't there more data on this card?
Playgroup Live collects per-card gameplay data from real Commander games. Play counts appear once a card reaches 100 tracked games, and the full charts need a sample of at least 25 observed games that is not dominated by a single pilot. Until this card clears those bars you're seeing only the basic counts. Stats refresh nightly.
How is Playgroup Live card data collected?
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 on this site are computed from those events, not from decklist scrapes or theorycrafting. Playgroup has recorded 740,000+ Commander games overall, and this card-level play data comes from the Playgroup Live seats playing virtual cards, a subset of that corpus.