Cheapest priced copy (The List): $1.99 at Card Kingdom, near mint, their price list as of .
Spidersilk Armor 
Enchantment · Common · Mercadian Masques · #273
Creatures you control get +0/+1 and have reach. (They can block creatures with flying.)
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $1.99 to $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Knights vs. Dragons | 32 | Common | $5.49 | — |
| Mercadian Masques | 273 | Common | $2.29 | $17.99 |
| The List | MMQ-273 | Common | $1.99 | — |