Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.35 at Card Kingdom, near mint, their price list as of .
Saddle of the Cavalier 
Artifact — Equipment · Uncommon · Commander Legends: Battle for Baldur's Gate · #251
Equipped creature gets +3/+3 and can't be blocked by creatures with power 3 or less.
Equip {3}
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 251 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 10 June 2022Reducing a creature's power after it has blocked a creature equipped with Saddle of the Cavalier will not remove that blocking creature from combat or make the equipped creature unblocked.