Cheapest priced copy (Tarkir: Dragonstorm): $0.35 at Card Kingdom, near mint, their price list as of .
Nightblade Brigade 
Creature — Goblin Soldier · 1/3 · Common · Tarkir: Dragonstorm · #85
Deathtouch
Mobilize 1 (Whenever this creature attacks, create a tapped and attacking 1/1 red Warrior creature token. Sacrifice it at the beginning of the next end step.)
When this creature enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tarkir: Dragonstorm | 85 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 4 April 2025You choose the player, planeswalker, or battle each Warrior token is attacking. They don’t all have to attack the same one, and they don’t have to attack the same player, planeswalker, or battle as the creature with mobilize.
- 4 April 2025Although the Warrior tokens enter as attacking creatures, they were never declared as attacking creatures. Abilities that trigger whenever a creature attacks won’t trigger when the tokens enter attacking.