Cheapest priced copy (Duel Decks: Knights vs. Dragons): $0.35 at Card Kingdom, near mint, their price list as of .
Henge Guardian 
Artifact Creature — Dragon Wurm · 3/4 · Uncommon · Mercadian Masques · #297
{2}: This creature gains trample until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.35 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Knights vs. Dragons | 55 | Uncommon | $0.35 | — |
| Mercadian Masques | 297 | Uncommon | $0.35 | $4.99 |