Cheapest priced copy (Modern Horizons 2): $0.35 at Card Kingdom, near mint, their price list as of .
Barbed Spike 
Artifact — Equipment · Uncommon · Modern Horizons 2 · #5
When this Equipment enters, create a 1/1 colorless Thopter artifact creature token with flying, then attach this Equipment to it.
Equipped creature gets +1/+0.
Equip {2}
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 2 | 5 | Uncommon | $0.35 | $0.49 |
| The List | MH2-5 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 18 June 2021The token will still be created even if Barbed Spike is not able to be attached to it (perhaps because it was destroyed in response to the ability).
- 18 June 2021Creating the Thopter token and attaching Barbed Spike to it happen as part of the resolution of the same ability. There is no time for an opponent to react after the token is created but before the Equipment is attached.