Cheapest priced copy (The Brothers' War): $0.49 at Card Kingdom, near mint, their price list as of .
Ashnod, Flesh Mechanist 
Legendary Creature — Human Artificer · 1/1 · Rare · The Brothers' War · #84
Deathtouch
Whenever Ashnod attacks, you may sacrifice another creature. If you do, create a tapped Powerstone token.
{5}, Exile a creature card from your graveyard: Create a tapped 3/3 colorless Zombie artifact creature token.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War | 84 | Rare | $0.49 | $0.79 |
| The Brothers' War | 323 | Rare | $0.49 | $1.49 |
| The Brothers' War Promos | 84p | Rare | $1.29 | $4.49Out of stock |
| The Brothers' War Promos | 84s | Rare | — | $0.79 |
3 rulings from Wizards of the Coast
- 14 October 2022You can use the {C} added by a Powerstone token on anything that isn't a nonartifact spell. This includes paying costs to activate abilities of both artifact and nonartifact permanents, paying ward costs, and so on.
- 14 October 2022Although all the cards in The Brothers' War that create Powerstone tokens create a tapped Powerstone token, entering the battlefield tapped isn't part of the token's definition. Notably, if you create a token that is a copy of a Powerstone token, the token copy won't enter the battlefield tapped.
- 14 October 2022Powerstone tokens are a kind of predefined token. Each one has the artifact subtype "Powerstone" and the ability "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell."