Cheapest priced copy (Tarkir: Dragonstorm): $1.49 at Card Kingdom, near mint, their price list as of .
Stadium Headliner 
Creature — Goblin Warrior · 1/1 · Rare · Tarkir: Dragonstorm · #122
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.)
{1}{R}, Sacrifice this creature: It deals damage equal to the number of creatures you control to target creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $1.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tarkir: Dragonstorm Promos | 122p | Rare | $2.29 | $2.99 |
| Tarkir: Dragonstorm Promos | 122s | Rare | — | $2.29 |
| Tarkir: Dragonstorm | 122 | Rare | $1.49 | $1.99 |
| Tarkir: Dragonstorm | 344 | Rare | $1.79 | $2.99 |
3 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.
- 4 April 2025The number of creatures you control is counted at the time the activated ability resolves. This means that an opponent can respond by destroying your creatures to reduce the amount of damage dealt.