Cheapest priced copy (March of the Machine Promos): $9.49 at Card Kingdom, near mint, their price list as of .
Wrenn and Realmbreaker 
Legendary Planeswalker — Wrenn · Mythic · March of the Machine Promos · #217p
Lands you control have "{T}: Add one mana of any color."
+1: Up to one target land you control becomes a 3/3 Elemental creature with vigilance, hexproof, and haste until your next turn. It's still a land.
−2: Mill three cards. You may put a permanent card from among the milled cards into your hand.
−7: You get an emblem with "You may play lands and cast permanent spells from your graveyard."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $9.49 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| March of the Machine | 217 | Mythic | $9.99 | $9.99 |
| March of the Machine | 322 | Mythic | $9.99 | $14.99 |
| March of the Machine Promos | 217p | Mythic | $9.49 | $9.99 |
| March of the Machine Promos | 217s | Mythic | — | $12.99Out of stock |
One ruling from Wizards of the Coast
- 14 April 2023The lands you play and spells you cast from your graveyard follow the usual timing restrictions, and you must pay any costs for spells you cast.