Cheapest priced copy (Murders at Karlov Manor Promos): $6.99 at Card Kingdom, near mint, their price list as of .
Leyline of the Guildpact 
Enchantment · Rare · Murders at Karlov Manor · #217
If this card is in your opening hand, you may begin the game with it on the battlefield.
Each nonland permanent you control is all colors.
Lands you control are every basic land type in addition to their other types.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $6.99 to $12.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Murders at Karlov Manor | 217 | Rare | $7.49 | $6.99 |
| Murders at Karlov Manor | 418 | Rare | $8.99 | $12.99 |
| Murders at Karlov Manor Promos | 217p | Rare | $6.99 | $6.99 |
| Murders at Karlov Manor Promos | 217s | Rare | — | $10.99 |
3 rulings from Wizards of the Coast
- 2 February 2024Each land you control will have the land types Plains, Island, Swamp, Mountain, and Forest. They'll also have the mana ability of each basic land type (for example, Forests have "{T}: Add {G}."). They'll still have their other subtypes and abilities.
- 2 February 2024Giving a land additional basic land types doesn't change its name or whether it's legendary or basic.
- 2 February 2024A player's "opening hand" is the hand of cards the player has after all players have taken mulligans. If players have any cards in hand that allow actions to be taken with them from a player's opening hand, the starting player takes all such actions first in any order, followed by each other player in turn order. Then the first turn begins.