Cheapest priced copy (Duel Decks: Heroes vs. Monsters): $0.35 at Card Kingdom, near mint, their price list as of .
Gustcloak Sentinel 
Creature — Human Soldier · 3/3 · Uncommon · Onslaught · #37
Whenever this creature becomes blocked, you may untap it and remove it from combat.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Heroes vs. Monsters | 13 | Uncommon | $0.35 | — |
| Duel Decks: Elspeth vs. Kiora | 12 | Uncommon | $0.35 | — |
| Onslaught | 37 | Uncommon | $0.35 | $0.79 |