Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Goma Fada Vanguard 
Creature — Human Warrior · 2/2 · Uncommon · Zendikar Rising · #141
Whenever this creature attacks, target creature an opponent controls with power less than or equal to the number of Warriors you control can't block this turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 561 | Uncommon | $0.35 | — |
| Zendikar Rising | 141 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 25 September 2020The power of the target creature and the number of Warriors you control are checked only as Goma Fada Vanguard's ability is put onto the stack and as that ability resolves. If the creature's power becomes greater after the ability has resolved, it still can't block.
- 25 September 2020The target creature is restricted from blocking anything, not just Goma Fada Vanguard.