Cheapest priced copy (Commander Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Dwarven Hammer 
Artifact — Equipment · Uncommon · Kaldheim · #133
When this Equipment enters, you may pay {2}. If you do, create a 2/1 red Dwarf Berserker creature token, then attach this Equipment to it.
Equipped creature gets +3/+0 and has trample.
Equip {3}
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 219 | Common | $0.35 | $0.49 |
| Kaldheim | 133 | Uncommon | $0.35 | $0.49 |
| The List | KHM-133 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 5 February 2021The Dwarf Berserker creature token enters the battlefield as a 2/1 creature. Any abilities that trigger when a creature with a certain power enters the battlefield will see the token enter as a 2/1 creature.
- 5 February 2021You decide whether to pay {2} as the enters-the-battlefield ability resolves. If you do, you immediately create the Dwarf Berserker creature token and attach Dwarven Hammer to it. No players may respond to your decision to pay or not, and no player may take actions during this process.