Ley Weaver — ruling 1

“Partner with [name]” represents two abilities. The first is a triggered ability: “When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle their library.”

Ley Weaver — ruling 2

Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren’t included in the ability’s reminder text.

Ley Weaver — ruling 3

A nonlegendary creature can’t be your commander, even if it has a “partner with” ability.

Ley Weaver : règles, fonctionnement et interactions (MTG)

Ley Weaver 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

Partner with Lore Weaver (When this creature enters, target player may put Lore Weaver into their hand from their library, then shuffle.) : Untap two target lands.

How it works : Ley Weaver

Original English text — Wizards of the Coast / Scryfall

#1June 8, 2018· Wizards of the Coast
“Partner with [name]” represents two abilities. The first is a triggered ability: “When this permanent enters the battlefield, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle their library.”
No other card is named in this ruling.
#2June 8, 2018· Wizards of the Coast
Note that the target player searches their library (which may be affected by effects such as that of Stranglehold) and that the card they find is revealed, even though these words aren’t included in the ability’s reminder text.
No other card is named in this ruling.
#3June 8, 2018· Wizards of the Coast
A nonlegendary creature can’t be your commander, even if it has a “partner with” ability.
No other card is named in this ruling.

Popular combos

Real combos played by the community, sorted by popularity.

#1
Ashaya, Soul of the Wild + Ley Weaver
Infinite mana lands you control can produceInfinite untap of creatures you controlInfinite mana creatures you control can produceInfinite untap of nontoken creatures you control
1Activate Ley Weaver by tapping it, untapping itself and any other land.
2Activate the land by tapping it, adding one mana of any color that land can produce.
3Repeat.

#1
Ashaya, Soul of the Wild + Ley Weaver
Infinite mana lands you control can produceInfinite untap of creatures you controlInfinite mana creatures you control can produceInfinite untap of nontoken creatures you control
1Activate Ley Weaver by tapping it, untapping itself and any other land.
2Activate the land by tapping it, adding one mana of any color that land can produce.
3Repeat.

#2
Ley Weaver + Maze of Ith
Infinite mana lands you control can produceInfinite untap of lands you control
1Declare Ley Weaver as an attacker.
2Holding priority, activate Maze of Ith by tapping it, untapping Ley Weaver.
3Activate Ley Weaver by tapping it, untapping Maze of Ith and any land that can tap to produce at least .
4Activate the additional land by tapping it, adding at least .
5Repeat from step 2.

#3
Freed from the Real + Ley Weaver
Infinite mana lands you control can produceInfinite untap of lands you control
1Activate Ley Weaver by tapping it, untapping two lands you control.
2Activate those lands by tapping them, adding at least .
3Activate Freed from the Real's last ability by paying , untapping Ley Weaver.
4Repeat.

#4
Pemmin's Aura + Ley Weaver
Infinite mana lands you control can produceInfinite untap of lands you control
1Activate Ley Weaver by tapping it, untapping two lands you control.
2Activate those lands by tapping them, adding at least .
3Activate Pemmin's Aura's first ability by paying , untapping Ley Weaver.
4Repeat.

#5
Toph, the First Metalbender + Ley Weaver + Liquimetal Torque
Infinite mana lands you control can produceInfinite untap of nontoken artifacts you controlInfinite mana nontoken artifacts you control can produceInfinite untap of lands you control
1Give the artifact type to Ley Weaver using Liquimetal Torque.
2Activate Ley Weaver by tapping it, untapping it as it's a land due to Toph and another land you control.
3Repeat step 2.

#6
Experiment Kraj + Ley Weaver + Horseshoe Crab
Infinite mana lands you control can produceInfinite +1/+1 counters on creatures you controlInfinite untap of lands you control
1Activate Experiment Kraj using Ley Weaver's ability by tapping it, untapping two lands you control.
2Activate a land by tapping it, adding at least .
3Activate Experiment Kraj using Horseshoe Crab's ability by paying , untapping Experiment Kraj.
4Repeat.
5You may tap an additional land each cycle to get infinite mana, and you may then use Experiment Kraj's ability to put infinite +1/+1 counters on creatures you control.

#7
Marvin, Murderous Mimic + Pili-Pala + Ley Weaver
Infinite colored manaInfinite mana lands you control can produceInfinite untap of lands you control
1Activate Marvin using Ley Weaver's ability by tapping it, untapping two lands.
2Activate two lands by tapping them, adding at least .
3Activate Marvin using Pili-Pala's ability by paying and untapping it, adding one mana of any color.
4Repeat.

#7
Marvin, Murderous Mimic + Pili-Pala + Ley Weaver
Infinite colored manaInfinite mana lands you control can produceInfinite untap of lands you control
1Activate Marvin using Ley Weaver's ability by tapping it, untapping two lands.
2Activate two lands by tapping them, adding at least .
3Activate Marvin using Pili-Pala's ability by paying and untapping it, adding one mana of any color.
4Repeat.

Interactions with other cards

These cards' text mentions Ley Weaver.

Lore Weaver

Partner with Ley Weaver (When this creature enters, target player may put Ley Weaver into their hand from their library, then shuffle.) {5}{U}{U}: Target player draws two cards.