Cheapest priced copy (Outlaws of Thunder Junction): $0.35 at Card Kingdom, near mint, their price list as of .
Scalestorm Summoner 
Creature — Human Warlock · 3/3 · Uncommon · Outlaws of Thunder Junction · #144
Whenever this creature attacks, create a 3/1 red Dinosaur creature token if you control a creature with power 4 or greater.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Outlaws of Thunder Junction | 144 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 12 April 2024Scalestorm Summoner’s ability triggers even if you don’t control any creatures with power 4 or greater. It checks only as it resolves to see if you do. You can respond to the ability by raising the power of a creature you control so you can create a Dinosaur token.