Cheapest priced copy (Oath of the Gatewatch): $0.35 at Card Kingdom, near mint, their price list as of .
Joraga Auxiliary 
Creature — Elf Soldier Ally · 2/3 · Uncommon · Oath of the Gatewatch · #154
{4}{G}{W}: Support 2. (Put a +1/+1 counter on each of up to two other target creatures.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Oath of the Gatewatch | 154 | Uncommon | $0.35 | $0.49 |
3 rulings from Wizards of the Coast
- 22 January 2016You can’t put more than one +1/+1 counter on any one target using the support action.
- 22 January 2016If a spell with support has other abilities that target creatures, those abilities and the support ability can target the same creature.
- 22 January 2016Support can target a creature you don’t control.