Cheapest priced copy (Duel Decks: Izzet vs. Golgari): $0.35 at Card Kingdom, near mint, their price list as of .
Goblin Electromancer 
Creature — Goblin Wizard · 2/2 · Common · Guilds of Ravnica · #174
Instant and sorcery spells you cast cost {1} less to cast.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
11 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2015 | 220 | Common | $0.49 | — |
| Duel Decks: Izzet vs. Golgari | 3 | Common | $0.35 | — |
| Duel Decks: Mind vs. Might | 22 | Common | $0.39 | — |
| Guilds of Ravnica | 174 | Common | $0.35 | $0.99 |
| Modern Masters 2017 | 166 | Common | $0.35 | $0.79 |
| New Capenna Commander | 341 | Common | $0.35 | — |
| Outlaws of Thunder Junction Commander | 228 | Common | $0.35 | — |
| Return to Ravnica | 163 | Common | $0.35 | $1.99 |
| Ravnica Remastered | 186 | Common | $0.35 | $0.79 |
| Ravnica Remastered | 367 | Common | $0.39 | $1.99 |
| Tarkir: Dragonstorm Commander | 99 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 14 March 2017Two Goblin Electromancers will make instant and sorcery spells you cast cost {2} less to cast, and so on.
- 5 October 2018Goblin Electromancer's effect reduces only generic mana in the spell's total cost.
- 5 October 2018To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.