Cheapest priced copy (Guildpact): $5.49 at Card Kingdom, near mint, their price list as of .
Gruul War Plow 
Artifact · Rare · Guildpact · #151
Creatures you control have trample.
{1}{R}{G}: This artifact becomes a 4/4 Juggernaut artifact creature until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $5.49 to $10.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guildpact | 151 | Rare | $5.49 | $10.99 |
3 rulings from Wizards of the Coast
- 1 February 2006While it's a creature, Gruul War Plow has creature type Juggernaut. It doesn't have any abilities associated with the card named Juggernaut.
- 1 February 2006While it's a creature, Gruul War Plow gives itself trample.
- 1 August 2008A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.