Cheapest priced copy (Masters 25): $0.35 at Card Kingdom, near mint, their price list as of .
Loyal Sentry 
Creature — Human Soldier · 1/1 · Rare · Starter 1999 · #20
When this creature blocks a creature, destroy that creature and this creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
5 printings · $0.35 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 27 | Rare | $0.59 | $1.49 |
| Masters 25 | 22 | Common | $0.35 | $0.49 |
| Duel Decks: Elspeth vs. Tezzeret | 5 | Rare | $0.49 | — |
| The List | A25-22 | Common | $0.35 | — |
| Starter 1999 | 20 | Rare | $5.99 | — |
One ruling from Wizards of the Coast
- 16 March 2018Loyal Sentry and the creature it blocks are destroyed before combat damage is dealt. The blocked creature is destroyed even if Loyal Sentry leaves the battlefield before its triggered ability resolves.