Cheapest priced copy (Forgotten Realms Commander): $0.49 at Card Kingdom, near mint, out of stock, their price list as of .
Loyal Apprentice 
Creature — Human Artificer · 2/1 · Uncommon · Commander Masters · #240
Haste
Lieutenant — At the beginning of combat on your turn, if you control your commander, create a 1/1 colorless Thopter artifact creature token with flying. That token gains haste until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
10 printings · $0.49 to $64.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 132 | Uncommon | $0.49Out of stock | — |
| Commander 2018 | 23 | Uncommon | $0.59Out of stock | — |
| Commander Masters | 240 | Uncommon | $0.59Out of stock | $2.99 |
| Aetherdrift Commander | 104 | Uncommon | $0.59 | — |
| Phyrexia: All Will Be One Commander | 102 | Uncommon | $0.49Out of stock | — |
| Fallout | 190 | Uncommon | $0.49Out of stock | $6.99 |
| Fallout | 718 | Uncommon | — | $64.99 |
| The List | C18-23 | Uncommon | $0.59Out of stock | — |
| The List | TDC-222 | Uncommon | — | — |
| Tarkir: Dragonstorm Commander | 222 | Uncommon | $0.59Out of stock | — |
3 rulings from Wizards of the Coast
- 13 July 2018The lieutenant effect happens only once each combat, even if you somehow control multiple commanders (perhaps because you have two commanders with a partner ability from the Battlebond™ set).
- 13 July 2018If you don't control your commander as the lieutenant ability resolves, you won't get its effect.
- 13 July 2018If you have multiple commanders, you need to control only one for the lieutenant effect to happen.