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Undercity Sewers card art
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Undercity Sewers

Land — Island Swamp · Murders at Karlov Manor (MKM)
Times Brought
812
Decks Running
411
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
Undercity Sewers card

Undercity Sewers

Land — Island Swamp
({T}: Add {U} or {B}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Murders at Karlov Manor (MKM) · Rare · Illustrated by Yeong-Hao Han

Final zone distribution

259 instances
1.5%
Library
64.1%
Battlefield
13.1%
Graveyard
6.2%
Exile

The "good card" funnel

812 brought · 355 players
Brought to game
812
Ever drawn
225
Reached battlefield
178
Still on board at game end
166

Once cast, 93% 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.

≥ -0.9pp

Players who cast this card win 26% of the time (n=144) , vs 22% when it never left the library (n=412).

When players drew this card but left it in hand, they won 27% (n=30).

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 +3.8pp; 95% confidence interval -0.9pp to +8.5pp. Correlational, not causal: powerful payoffs also get cast more often in games you are already winning.

First-cast turn

n=178
34%
T1
12%
T2
11%
T3
8%
T4
8%
T5
22%
T6-9
4%
T10+
Median 3.0 P25 1 · P75 6 · max 11
Cast same turn as drawn 74%

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 680,000+ Commander games overall, and this card-level play data comes from the Playgroup Live subset of that corpus.