Leyline of the Guildpact is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
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.
Complete guide
Leyline of the Guildpact is a powerful enchantment that instantly unifies your board into a prismatic force. By turning your lands into every basic land type and your permanents into all colors, it fixes your mana and enables powerful color-based synergies from the very start of the match.
What It Does
This card provides two major continuous effects: it makes all your nonland permanents every color (White, Blue, Black, Red, and Green) and grants all your lands every basic land type (Plains, Island, Swamp, Mountain, and Forest). Additionally, if it is in your opening hand after mulligans, you can put it onto the battlefield before the first turn begins without paying its mana cost.
How It Resolves Step by Step
First, the 'Leyline' ability occurs before the game starts; if you have it in your opening hand, you simply place it on the battlefield. Once on the battlefield, its effects are static. For your lands, this means they gain the intrinsic mana abilities of every basic land type, such as '{T}: Add {R}' or '{T}: Add {U}'. For your nonland permanents, they retain their original colors but gain all others, making them five-colored for the purposes of spells or abilities that check for specific colors.
Common Mistakes
One common misconception is that this card changes a land's name or its supertypes; it does not. A non-basic land like a utility land remains non-basic and keeps its original name and abilities. Another mistake is forgetting that 'opening hand' refers to the hand you keep after all mulligans are finished. If you mulligan a hand containing the Leyline, you cannot put it into play unless it is also in your new, kept hand.
When to Play It
This is a staple for decks that rely on 'Domain' mechanics or heavy color requirements. It is best used when your strategy involves permanents that get stronger based on the number of colors you control or when you are playing a four- or five-color deck that needs perfect mana fixing immediately.
Interaction examples
Rhystic StudyWith Leyline of the Guildpact on the battlefield, your Rhystic Study is no longer just a Blue enchantment; it is now White, Blue, Black, Red, and Green. If an opponent plays a spell that targets a 'non-Green permanent,' Rhystic Study is now an illegal target because it is Green.
Smothering TitheWhile Leyline of the Guildpact is active, your Smothering Tithe is a five-colored permanent. More importantly, all your lands now have the ability to tap for any color of mana because they possess every basic land type. This ensures you always have the {2} required to pay for an opponent's Smothering Tithe or the specific colors needed to cast your own spells.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Leyline of the Guildpact
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
A 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.
No other card is named in this ruling.
- #2· Wizards of the Coast
Each 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 "
: Add 
."). They'll still have their other subtypes and abilities.No other card is named in this ruling.
- #3· Wizards of the Coast
Giving a land additional basic land types doesn't change its name or whether it's legendary or basic.
No other card is named in this ruling.
Popular combos
Real combos played by the community, sorted by popularity.
Leyline of the Guildpact + Coalition Victory
- 1Cast Coalition Victory by paying
, causing you to win the game.
Jyoti, Moag Ancient + Deadeye Navigator + Tatyova, Steward of Tides + Leyline of the Guildpact
- 1Activate Jyoti by paying
, blinking it. - 2When Jyoti enters, it and Deadeye Navigator trigger.
- 3Resolve the Jyoti trigger, creating a 1/1 Forest Dryad land creature token for each time you've cast your commander from the command zone this game
- 4When the Forest Dryads enter, Tatyova triggers that many times, giving them haste until end of turn.
- 5Resolve the Deadeye Navigator trigger, repairing it and Jyoti.
- 6Activate two Forest Dryads by tapping them, adding .
- 7Repeat.
Legal formats
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