Cheapest priced copy (Dragons of Tarkir): $0.35 at Card Kingdom, near mint, their price list as of .
Kolaghan Aspirant 
Creature — Human Warrior · 2/1 · Common · Dragons of Tarkir · #143
Whenever this creature becomes blocked by a creature, this creature deals 1 damage to that creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dragons of Tarkir | 143 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 25 February 2015The damage Kolaghan Aspirant deals because of its triggered ability isn’t combat damage. If that damage causes each creature blocking it to leave combat, Kolaghan Aspirant will remain blocked. It won’t be dealt combat damage in this case.
- 25 February 2015If Kolaghan Aspirant becomes blocked by multiple creatures, its ability will trigger once for each of them.