Cheapest priced copy (Duel Decks: Divine vs. Demonic): $0.35 at Card Kingdom, near mint, their price list as of .
Breeding Pit 
Enchantment · Uncommon · Fallen Empires · #35
At the beginning of your upkeep, sacrifice this enchantment unless you pay {B}{B}.
At the beginning of your end step, create a 0/1 black Thrull creature token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
5 printings · $0.35 to $0.39 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Edition | 148 | Uncommon | $0.39 | — |
| Duel Decks: Divine vs. Demonic | 53 | Uncommon | $0.35 | — |
| Duel Decks Anthology: Divine vs. Demonic | 53 | Uncommon | $0.35 | — |
| Fallen Empires | 35 | Uncommon | $0.39 | — |
| The List | DDC-53 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 4 October 2004Breeding Pit must actually be on the battlefield at the beginning of the endstep in order for you to get a Thrull. The getting of the Thrull is not part of paying the upkeep, it is part of having the card on the battlefield.