Cheapest priced copy (Eldritch Moon): $0.35 at Card Kingdom, near mint, their price list as of .
Wolfkin Bond 
Enchantment — Aura · Common · Core Set 2020 · #203
Enchant creature
When this Aura enters, create a 2/2 green Wolf creature token.
Enchanted creature gets +2/+2.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eldritch Moon | 178 | Common | $0.35 | $0.49 |
| Jumpstart 2022 | 741 | Common | $0.35 | — |
| Core Set 2020 | 203 | Common | $0.35 | $0.49 |
| The List | EMN-178 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 12 July 2019If the target creature is an illegal target by the time Wolfkin Bond tries to resolve, the spell doesn't resolve. It won't enter the battlefield, so its ability won't trigger.
- 12 July 2019You need a creature for Wolfkin Bond to target as you cast it. It can't enter the battlefield attached to the Wolf token it will create.