Cheapest priced copy (Doctor Who): $6.99 at Card Kingdom, near mint, their price list as of .
Astrid Peth 
Legendary Creature — Human · 2/2 · Rare · Doctor Who · #334
Whenever Astrid Peth enters or attacks, create a Food token.
Brand-new Sky — Whenever you sacrifice a Clue or Food, Astrid Peth explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $6.99 to $11.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Doctor Who | 11 | Rare | $6.99 | $8.99 |
| Doctor Who | 334 | Rare | $8.49 | $9.99 |
| Doctor Who | 616 | Rare | — | $11.99 |
| Doctor Who | 925 | Rare | — | $10.99 |
7 rulings from Wizards of the Coast
- 13 October 2023If no card is revealed, most likely because that player's library is empty, the exploring creature receives a +1/+1 counter.
- 13 October 2023Once an ability that causes a creature to explore begins to resolve, no player may take any other actions until it's done. Notably, opponents can't try to remove the exploring creature after you reveal a nonland card but before it receives a counter.
- 13 October 2023If a resolving spell or ability instructs a specific creature to explore but that creature has left the battlefield, the creature still explores. If you reveal a nonland card this way, you won't put a +1/+1 counter on anything, but you may put the revealed card into your graveyard. Effects that trigger "whenever a creature you control explores" trigger if appropriate.
- 8 November 2024Food is an artifact type. Even though it appears on some creatures, it's never a creature type.
- 8 November 2024You can't sacrifice a Food to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate Maraleaf Rider's ability.
- 8 November 2024If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, you can sacrifice Tough Cookie (an Artifact Creature — Food Golem) to activate Maraleaf Rider's ability (an ability with "Sacrifice a Food" in its cost).
- 8 November 2024Whatever you do, don't eat the delicious cards.