Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Ulvenwald Mysteries 
Enchantment · Uncommon · Innistrad Remastered · #423
Whenever a nontoken creature you control dies, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")
Whenever you sacrifice a Clue, create a 1/1 white Human Soldier creature token.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 184 | Uncommon | $0.35 | $0.49 |
| Innistrad Remastered | 222 | Uncommon | $0.35 | $0.49 |
| Innistrad Remastered | 423 | Uncommon | $0.35 | $0.49 |
| Foundations Jumpstart | 735 | Uncommon | $0.35 | — |
| Murders at Karlov Manor Commander | 193 | Uncommon | $0.35 | — |
| The List | SOI-236 | Uncommon | $0.35 | — |
| Shadows over Innistrad | 236 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 24 January 2025The last ability is a triggered ability, not an activated ability. It doesn’t allow you to sacrifice a Clue whenever you want; rather, you need some other way of sacrificing it, such as the activated ability that Clue tokens have.
- 24 January 2025If you sacrifice a Clue as part of casting a spell or activating an ability, the last ability will resolve before that spell or ability.
- 24 January 2025If a nontoken creature dies at the same time as Ulvenwald Mysteries leaves the battlefield, the first ability triggers. Similarly, if Ulvenwald Mysteries isn’t a token and has become a creature, it dying will cause its own first ability to trigger.