Cheapest priced copy (Tarkir: Dragonstorm Commander): $5.99 at Card Kingdom, near mint, their price list as of .
Arbor Adherent 
Creature — Dog Druid · 2/4 · Rare · Tarkir: Dragonstorm Commander · #42
{T}: Add one mana of any color.
{T}: Add X mana of any one color, where X is the greatest toughness among other creatures you control.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $5.99 to $6.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tarkir: Dragonstorm Commander | 42 | Rare | $5.99 | — |
| Tarkir: Dragonstorm Commander | 82 | Rare | $6.49 | — |