Cheapest priced copy (Murders at Karlov Manor): $0.35 at Card Kingdom, near mint, their price list as of .
Hedge Whisperer 
Creature — Elf Druid Detective · 0/3 · Uncommon · Murders at Karlov Manor · #165
You may choose not to untap this creature during your untap step.
{3}{G}, {T}, Collect evidence 4: Target land you control becomes a 5/5 green Plant Boar creature with haste for as long as this creature remains tapped. It's still a land. Activate only as a sorcery. (To collect evidence 4, exile cards with total mana value 4 or greater from your graveyard.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Murders at Karlov Manor | 165 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 2 February 2024If Hedge Whisperer leaves the battlefield before its activated ability resolves, the target land won't become a creature at all.
- 2 February 2024If you can't exile enough cards to meet or exceed the required mana value, you can't choose to collect evidence at all.
- 2 February 2024Once you've announced that you're casting a spell, players can't take actions until you've finished doing so. Notably, opponents can't try to remove cards from your graveyard to stop you from collecting evidence.