Krav, the Unredeemed — ruling 1

Krav can be sacrificed to pay the cost for its own ability. The +1/+1 counters won't be put on anything.

Krav, the Unredeemed — ruling 2

"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."

Krav, the Unredeemed — ruling 3

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.

Krav, the Unredeemed — ruling 4

The second ability represented by the "partner with [name]" keyword modifies the rules for deck construction in the Commander variant and has no function outside of that variant. If a legendary creature card with "partner with [name]" is designated as your commander, the named legendary creature card can also be designated as your commander. For more information on the Commander variant, please visit Wizards.com/Commander.

Krav, the Unredeemed — ruling 5

If your Commander deck has two commanders, you can only include cards whose own color identities are also found in your commanders' combined color identities. If Khorvath and Sylvia are your commanders, your deck may contain cards with red and/or white in their color identity, but not blue, black, or green.

Krav, the Unredeemed — ruling 6

Both commanders start in the command zone, and the remaining 98 cards of your deck are shuffled to become your library.

Krav, the Unredeemed — ruling 7

To have two commanders, both must have the partner ability (featured in the Magic: The Gathering—Commander™ (2016 Edition) set) or corresponding "partner with" abilities as the game begins. A creature with a "partner with" ability can't partner with any creature other than its designated partner. Losing a partner ability during the game doesn't cause either to cease to be your commander.

Krav, the Unredeemed — ruling 8

Once the game begins, your two commanders are tracked separately. If you cast one, you won't have to pay an additional {2} the first time you cast the other. A player loses the game after having been dealt 21 damage from one of them, not from both of them combined. Command Beacon's effect puts one into your hand from the command zone, not both.

Krav, the Unredeemed : règles, fonctionnement et interactions (MTG)

Krav, the Unredeemed 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 Regna, the Redeemer (When this creature enters, target player may put Regna into their hand from their library, then shuffle.) , Sacrifice X creatures: Target player draws X cards and gains X life. Put X +1/+1 counters on Krav.

How it works : Krav, the Unredeemed

Original English text — Wizards of the Coast / Scryfall

#1June 8, 2018· Wizards of the Coast
Krav can be sacrificed to pay the cost for its own ability. The +1/+1 counters won't be put on anything.
No other card is named in this ruling.
#2June 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.
#3June 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.
#4June 8, 2018· Wizards of the Coast
The second ability represented by the "partner with [name]" keyword modifies the rules for deck construction in the Commander variant and has no function outside of that variant. If a legendary creature card with "partner with [name]" is designated as your commander, the named legendary creature card can also be designated as your commander. For more information on the Commander variant, please visit Wizards.com/Commander.
No other card is named in this ruling.
#5June 8, 2018· Wizards of the Coast
If your Commander deck has two commanders, you can only include cards whose own color identities are also found in your commanders' combined color identities. If Khorvath and Sylvia are your commanders, your deck may contain cards with red and/or white in their color identity, but not blue, black, or green.
No other card is named in this ruling.
#6June 8, 2018· Wizards of the Coast
Both commanders start in the command zone, and the remaining 98 cards of your deck are shuffled to become your library.
No other card is named in this ruling.
#7June 8, 2018· Wizards of the Coast
To have two commanders, both must have the partner ability (featured in the Magic: The Gathering—Commander™ (2016 Edition) set) or corresponding "partner with" abilities as the game begins. A creature with a "partner with" ability can't partner with any creature other than its designated partner. Losing a partner ability during the game doesn't cause either to cease to be your commander.
No other card is named in this ruling.
#8June 8, 2018· Wizards of the Coast
Once the game begins, your two commanders are tracked separately. If you cast one, you won't have to pay an additional the first time you cast the other. A player loses the game after having been dealt 21 damage from one of them, not from both of them combined. Command Beacon's effect puts one into your hand from the command zone, not both.
No other card is named in this ruling.
#9June 8, 2018· Wizards of the Coast
An effect that checks whether you control your commander is satisfied if you control one or both of your two commanders.
No other card is named in this ruling.
#10June 8, 2018· Wizards of the Coast
The triggered ability of the "partner with" keyword still triggers in a Commander game. If your other commander has somehow ended up in your library, you can find it. You can also target another player who might have that card in their library.
No other card is named in this ruling.

Popular combos

Real combos played by the community, sorted by popularity.

#1
Krav, the Unredeemed + Orcish Bowmasters + Pitiless Plunderer
Infinite card draw for opponentsInfinite draw triggers for each opponentNear-infinite +1/+1 counters on a creatureNear-infinite damage
1Activate Krav by paying and sacrificing all Armies you control, or one other creature if you don't control an Army.
2When the sacrificed creature(s) die, Pitiless Plunderer triggers that many times, creating that many Treasure tokens.
3Resolve Krav's ability, causing an opponent to draw a card and gain 1 life for each creature sacrificed this way, and for you to put that many +1/+1 counters on Krav.
4Orcish Bowmasters triggers for each card drawn this way, dealing that much damage to any target and causing you to gain that much life, then creating a 0/0 Orc Army creature token and put a +1/+1 counter on it for each card drawn.
5Activate a Treasure by tapping and sacrificing it, adding .
6Repeat.

#1
Krav, the Unredeemed + Orcish Bowmasters + Pitiless Plunderer
Infinite card draw for opponentsInfinite draw triggers for each opponentNear-infinite +1/+1 counters on a creatureNear-infinite damage
1Activate Krav by paying and sacrificing all Armies you control, or one other creature if you don't control an Army.
2When the sacrificed creature(s) die, Pitiless Plunderer triggers that many times, creating that many Treasure tokens.
3Resolve Krav's ability, causing an opponent to draw a card and gain 1 life for each creature sacrificed this way, and for you to put that many +1/+1 counters on Krav.
4Orcish Bowmasters triggers for each card drawn this way, dealing that much damage to any target and causing you to gain that much life, then creating a 0/0 Orc Army creature token and put a +1/+1 counter on it for each card drawn.
5Activate a Treasure by tapping and sacrificing it, adding .
6Repeat.

#3
Krav, the Unredeemed + The Locust God + Pitiless Plunderer
Infinite card drawInfinite draw triggersNear-infinite +1/+1 counters on a creatureNear-infinite death triggers
1Activate Krav by paying and sacrificing a creature.
2Pitiless Plunderer triggers, creating a Treasure token.
3Resolve the Krav ability, causing you to draw a card, gain 1 life, and put a +1/+1 counter on Krav.
4The Locust God triggers, creating a 1/1 Insect creature token.
5Activate the Treasure token by tapping and sacrificing it, adding .
6Repeat.

Interactions with other cards

These cards' text mentions Krav, the Unredeemed.

Regna, the Redeemer

Partner with Krav, the Unredeemed (When this creature enters, target player may put Krav into their hand from their library, then shuffle.) Flying At the beginning of each end step, if your team gained life this turn, create two 1/1 white Warrior creature tokens.