Cheapest priced copy (March of the Machine): $0.99 at Card Kingdom, near mint, their price list as of .
Realmbreaker, the Invasion Tree 
Legendary Artifact · Rare · March of the Machine · #374
{2}, {T}: Target opponent mills three cards. Put a land card from their graveyard onto the battlefield tapped under your control. It gains "If this land would leave the battlefield, exile it instead of putting it anywhere else."
{10}, {T}, Sacrifice Realmbreaker: Search your library for any number of Praetor cards, put them onto the battlefield, then shuffle.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 263 | Rare | $0.99 | $0.99 |
| March of the Machine | 374 | Rare | $1.79 | $2.49 |
| The List | MOM-263 | Rare | $0.99 | — |
| March of the Machine Promos | 263p | Rare | $1.29 | $1.49 |
| March of the Machine Promos | 263s | Rare | — | $1.49 |
2 rulings from Wizards of the Coast
- 14 April 2023In a multiplayer game, if a player leaves the game, all cards that player owns leave as well. If you leave the game, any lands you control from Realmbreaker's ability are exiled.
- 14 April 2023The land card you put onto the battlefield can be one that was just milled, or it can be one that was already in their graveyard.