Cheapest priced copy (Fifth Edition): $0.49 at Card Kingdom, near mint, their price list as of .
Urza's Avenger 
Artifact Creature — Shapeshifter · 4/4 · Uncommon · Renaissance · #164
{0}: This creature gets -1/-1 and gains your choice of banding, flying, first strike, or trample until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
6 printings · $0.49 to $9.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fourth Edition Foreign Black Border | 355 | Rare | — | — |
| Fourth Edition | 355 | Rare | $0.79 | — |
| Fifth Edition | 405 | Rare | $0.49 | — |
| Antiquities | 74 | Rare | $9.49 | — |
| Renaissance | 164 | Uncommon | — | — |
| Rinascimento | 144 | Uncommon | — | — |
One ruling from Wizards of the Coast
- 4 October 2004The -1/-1 is not permanent. It lasts until the end of the turn as do the abilities that are granted.