Cheapest priced copy (March of the Machine Commander): $0.99 at Card Kingdom, near mint, their price list as of .
Elspeth's Talent 
Enchantment — Aura · Rare · March of the Machine Commander · #72
Enchant planeswalker
Enchanted planeswalker has "[+1]: Create three 1/1 white Soldier creature tokens."
Whenever you activate a loyalty ability of enchanted planeswalker, creatures you control get +2/+2 and gain vigilance until end of turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.79 to $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine Commander | 72 | Rare | $0.99 | $0.79 |
| March of the Machine Commander | 80 | Rare | $1.29 | $0.79 |
3 rulings from Wizards of the Coast
- 14 April 2023You can activate one loyalty ability of each planeswalker you control during each of your turns, whether that ability is one it always has or the one it gains because of Elspeth's Talent.
- 14 April 2023The last ability will resolve before the loyalty ability that caused it to trigger. Notably, if that loyalty ability creates creature tokens, those creatures won't be on the battlefield yet to get +2/+2 and gain vigilance.
- 14 April 2023The set of creatures affected by Elspeth's Talent's last ability is determined as the ability resolves. Creatures you begin to control later in the turn and noncreature permanents that become creatures later in the turn won't get +2/+2 and gain vigilance.