Cheapest priced copy (Secrets of Strixhaven Commander): $2.99 at Card Kingdom, near mint, their price list as of .
Tyvar's Stand 
Instant · Uncommon · Phyrexia: All Will Be One · #190
Target creature you control gets +X/+X and gains hexproof and indestructible until end of turn. (It can't be the target of spells or abilities your opponents control. Damage and effects that say "destroy" don't destroy it.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $2.99 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Phyrexia: All Will Be One | 190 | Uncommon | $3.49 | $2.99 |
| The List | ONE-190 | Uncommon | $3.49 | — |
| Secrets of Strixhaven Commander | 291 | Uncommon | $2.99 | — |