Cheapest priced copy (Doctor Who): $0.49 at Card Kingdom, near mint, their price list as of .
Jenny, Generated Anomaly 
Legendary Creature — Time Lord Soldier · 2/3 · Rare · Doctor Who · #421
Double strike
Whenever Jenny deals combat damage to a player, it 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 · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Doctor Who | 137 | Rare | $0.49 | $0.49 |
| Doctor Who | 421 | Rare | $0.49 | $0.49 |
| Doctor Who | 742 | Rare | — | $0.79 |
| Doctor Who | 1012 | Rare | — | $0.99 |
6 rulings from Wizards of the Coast
- 13 October 2023Unlike other creature types in Magic that are each only one word, the two words "Time Lord" represent a single creature subtype. Time Lord is the only two-word creature type.
- 13 October 2023If an effect instructs you to choose a creature type, you may choose Time Lord.
- 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 2023Neither "Time" nor "Lord" are creature types. Some older cards were printed with the subtype "Lord," but all of those cards have updated Oracle card text that removed that type.
- 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.