Cheapest priced copy (Double Masters): $0.69 at Card Kingdom, near mint, their price list as of .
Master of Etherium 
Artifact Creature — Vedalken Wizard · */* · Rare · Shards of Alara · #49
Master of Etherium's power and toughness are each equal to the number of artifacts you control.
Other artifact creatures you control get +1/+1.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
10 printings · $0.69 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 57 | Rare | $0.69 | $2.99 |
| Shards of Alara | 49 | Rare | $1.29 | $4.49 |
| The Brothers' War Commander | 86 | Rare | $0.69 | — |
| Commander 2016 | 92 | Rare | $0.79 | — |
| Duel Decks: Elspeth vs. Tezzeret | 48 | Rare | $0.99 | — |
| Foundations Commander | 66 | Rare | $0.69 | — |
| Planechase | 11 | Rare | $0.99 | — |
| March of the Machine Commander | 226 | Rare | $0.69 | — |
| Neon Dynasty Commander | 94 | Rare | $0.69 | — |
| Salvat 2011 | 43 | Rare | — | — |
3 rulings from Wizards of the Coast
- 7 August 2020Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to Master of Etherium may become lethal if other artifacts you control leave the battlefield during that turn, and damage dealt to other artifact creatures you control may become lethal if Master of Etherium leaves the battlefield during that turn.
- 7 August 2020The ability that defines Master of Etherium's power and toughness applies in all zones, not just the battlefield.
- 7 August 2020As long as Master of Etherium is on the battlefield, its ability will count itself.