Cheapest priced copy (Foundations Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Darksteel Juggernaut 
Artifact Creature — Juggernaut · */* · Rare · Commander 2018 · #202
Indestructible
Darksteel Juggernaut's power and toughness are each equal to the number of artifacts you control.
This creature attacks each combat if able.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $0.49 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War Commander | 137 | Rare | $1.49 | — |
| Commander 2018 | 202 | Rare | $1.29 | — |
| Foundations Commander | 252 | Rare | $0.49 | — |
| Media and Collaboration Promos | 2010-1 | Rare | — | — |
| Scars of Mirrodin | 150 | Rare | $1.49 | $6.99 |
4 rulings from Wizards of the Coast
- 1 January 2011Lethal damage and effects that say "destroy" won't cause Darksteel Juggernaut to be put into the graveyard. However, it can be put into the graveyard for a number of other reasons. The most likely reasons are if its toughness is 0 or less or it's sacrificed.
- 1 January 2011The first ability works in all zones.
- 1 January 2011Since Darksteel Juggernaut is itself an artifact, its power and toughness will always be at least 1 while it's on the battlefield (unless a spell or ability somehow changes its card type).
- 1 January 2011If, during your declare attackers step, Darksteel Juggernaut is tapped, is affected by a spell or ability that says it can't attack, or is affected by "summoning sickness," then it doesn't attack. If there's a cost associated with having Darksteel Juggernaut attack, you aren't forced to pay that cost, so it doesn't have to attack in that case either.