Cheapest priced copy (Journey into Nyx): $0.39 at Card Kingdom, near mint, their price list as of .
Lagonna-Band Trailblazer 
Creature — Centaur Scout · 0/4 · Common · Journey into Nyx · #14
Heroic — Whenever you cast a spell that targets this creature, put a +1/+1 counter on it.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.39 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Journey into Nyx | 14 | Common | $0.39 | $1.99 |
| The List | JOU-14 | Common | $0.39 | — |
3 rulings from Wizards of the Coast
- 26 April 2014Heroic abilities won't trigger when a copy of a spell is created on the stack or when a spell's targets are changed to include a creature with a heroic ability.
- 26 April 2014Heroic abilities will resolve before the spell that caused them to trigger.
- 26 April 2014Heroic abilities will trigger only once per spell, even if that spell targets the creature with the heroic ability multiple times.