Thorough Investigation
Tracked across real Commander games played through TurnZero HQ.
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What it does
Whenever you attack, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")
Whenever you sacrifice a Clue, venture into the dungeon. (Enter the first room or advance to the next room.)
Rulings
11 official rulings, in the order Wizards published them.
- 2021-07-23
Choosing the dungeon or room to venture into is part of resolving the venture into the dungeon keyword action. Once that choice is made, players may not respond until after the appropriate room ability has triggered.
- 2021-07-23
You can only move forward (well, downward) in a dungeon, never backwards or sideways.
- 2021-07-23
A player may only have one dungeon in the command zone at a time.
- 2021-07-23
Dungeons are removed from the game as a state-based action.
- 2021-07-23
To venture into the dungeon, a player moves their venture marker into the next room of the dungeon they are currently in. If they aren't currently in a dungeon, that player instead chooses a dungeon card from outside the game, puts it into the command zone, and moves their venture marker onto the first room.
- 2021-07-23
Thorough Investigation's first ability can trigger only once per combat, no matter how many creatures you attack with.
- 2021-07-23
Moving into a dungeon room will cause its room ability to trigger.
- 2021-07-23
Once you resolve the last room ability of a dungeon, that dungeon is now completed and is removed from the game.
- 2021-07-23
If you somehow venture into the dungeon while a room's ability is on the stack, you will continue on in the dungeon. If you're already in the last room, complete that dungeon and start a new one.
- 2021-07-23
The player venturing into the dungeon chooses which dungeon they will venture into. They may choose a dungeon that they have already completed this game.
- 2021-07-23
Dungeon cards are not part of a player's deck or sideboard. In both constructed and limited formats, players can use any dungeon card when they venture into the dungeon.
Rulings are Wizards of the Coast's own, mirrored from Scryfall and refreshed nightly.
In the 99
Every deck whose current list includes Thorough Investigation, whatever its commander.
Most played under
| Commander | Decks | Games | Win rate |
|---|---|---|---|
| Sefris of the Hidden Ways | 1 | 0 | — |
Colors it shows up in
- Esper 1 deck
Thorough Investigation price history
The Forgotten Realms Commander #12 printing, as Scryfall reports the TCGplayer market. Updated nightly. Click any version below to chart its price.
Every recorded price change
| Date | Non-foil |
|---|---|
| Oct 26, 2026 | $2.43 |
| Oct 25, 2026 | $2.42 |
| Oct 23, 2026 | $2.43 |
| Oct 22, 2026 | $2.38 |
| Oct 21, 2026 | $2.37 |
| Oct 19, 2026 | $2.27 |
| Oct 17, 2026 | $2.28 |
| Oct 13, 2026 | $2.22 |
| Oct 10, 2026 | $2.23 |
| Oct 9, 2026 | $2.24 |
| Oct 7, 2026 | $2.22 |
| Oct 5, 2026 | $2.25 |
| Oct 4, 2026 | $2.28 |
| Oct 3, 2026 | $2.25 |
| Oct 1, 2026 | $2.26 |
| Sep 30, 2026 | $2.24 |
| Sep 29, 2026 | $2.25 |
| Sep 28, 2026 | $2.33 |
A row is recorded only on nights the price moved, so each price held until the row above it.
Every version of Thorough Investigation
2 printings, newest first. Prices are the market figures Scryfall publishes, refreshed nightly. A printing with no figure shows a dash rather than a zero, because Scryfall publishes none for some of them. Click a card's art to chart that version's price above.
- Normal
- $2.43
Extended Art
- Normal
- $3.13
Prices from Scryfall, which tracks the TCGplayer and Cardmarket markets. They move daily and are a guide rather than a quote. Search TCGplayer for Thorough Investigation. It runs a name search across every version, which covers the printings TCGplayer publishes no direct link to.
Aggregated from Commander games tracked in TurnZero HQ. Every figure counts decks and games only. No individual deck list, player or playgroup is identified. Win rates are withheld below 5 completed games, where the sample is too small to mean anything.
