Cheapest priced copy (Saviors of Kamigawa): $0.49 at Card Kingdom, near mint, their price list as of .
Stampeding Serow 
Creature — Antelope Beast · 5/4 · Uncommon · Saviors of Kamigawa · #150
Trample
At the beginning of your upkeep, return a green creature you control to its owner's hand.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Saviors of Kamigawa | 150 | Uncommon | $0.49 | $0.49 |
2 rulings from Wizards of the Coast
- 1 February 2014You choose a creature and return it all during resolution of the triggered ability. This means that if you control two of these, there is no way to end up returning only one creature.
- 1 February 2014The ability that returns a creature doesn’t target anything. You can return a creature with shroud or protection from green, for example. You don’t decide which creature to return until the ability resolves. If you control no other green creatures, you must return Stampeding Serow itself.