Cheapest priced copy (Urza's Legacy): $0.35 at Card Kingdom, near mint, their price list as of .
Walking Sponge 
Creature — Sponge · 1/1 · Uncommon · Urza's Legacy · #47
{T}: Target creature loses your choice of flying, first strike, or trample until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 to $8.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Urza's Legacy | 47 | Uncommon | $0.35 | $8.99 |
One ruling from Wizards of the Coast
- 4 October 2004The target loses just one of the listed abilities.