Yu-Gi-Oh! · Shadow of Infinity
Machine King Prototype
French name: Roi-Machine Prototype
Machine King Prototype (Shadow of Infinity SOI-EN012) has a market price of US$0.21 to US$0.23 as of Nov 8, 2026.
Price guide
The market price on TCGplayer, in US dollars: a guide, not an offer.
Market price
As of Nov 8, 2026 · The market price is TCGplayer’s, in US dollars. It is a guide, not an offer.
Card details
- Type
- Effect Monster
- Level
- 3
- Attribute
- EARTH
- Monster type
- Machine
- ATK
- 1,600
- DEF
- 1,500
Card text
Effect: Increase the ATK and DEF of this card by 100 points for each Machine-Type monster on the field other than this card.
About this card
Machine King Prototype is card SOI-EN012 in Shadow of Infinity, a Yu-Gi-Oh! set released Feb 18, 2006. Rarity: Common. Finishes: Unlimited, 1st Edition. Reference market price on Nov 8, 2026: US$0.23 (Unlimited), US$0.21 (1st Edition). Over the last 30 days, the Unlimited price went up 27.8%. Source: TCGplayer market data via tcgcsv.com, updated daily. A reference price is not an offer.
Articles about this card
- Most expensive Yu-Gi-Oh! cards: records and the top 20The most expensive Yu-Gi-Oh! cards: the top 20 regular cards, then prize and one-of-a-kind cards like Tyler the Great Warrior, in USD and CAD.
