Cheapest priced copy (Seventh Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Hollow Dogs 
Creature — Phyrexian Zombie Dog · 3/3 · Common · Starter 1999 · #81
Whenever this creature attacks, it gets +2/+0 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
7 printings · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Seventh Edition | 141 | Common | $0.35 | — |
| Seventh Edition | 141★ | Common | — | $2.99 |
| Ninth Edition | 139 | Common | $0.35 | — |
| Ninth Edition | 139★ | Common | — | $0.49 |
| Beatdown Box Set | 28 | Common | $0.35 | — |
| Starter 1999 | 81 | Common | $0.35 | — |
| Urza's Saga | 137 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 4 October 2004If it attacks more than once per turn, it gets the bonus each time.