Rocksteady, Mutant Marauder — ruling 1

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

Rocksteady, Mutant Marauder — 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.

Rocksteady, Mutant Marauder — ruling 3

An effect that checks whether you control your commander is satisfied if you control one or both of your two commanders.

Rocksteady, Mutant Marauder — ruling 4

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, whether or not they have that card in their library.

Rocksteady, Mutant Marauder — ruling 5

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

Rocksteady, Mutant Marauder — ruling 6

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 Bebop, Skull and Crossbones and Rocksteady, Mutant Marauder are your commanders, your deck may contain cards with black and/or green in their color identities, but not white, blue, or red.

Rocksteady, Mutant Marauder — ruling 7

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.

Rocksteady, Mutant Marauder — ruling 8

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.

Rocksteady, Mutant Marauder : règles, fonctionnement et interactions (MTG)

Rocksteady, Mutant Marauder 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 Bebop, Skull & Crossbones (When this creature enters, target player may put Bebop into their hand from their library, then shuffle.) Trample Whenever another nontoken creature you control enters, put a +1/+1 counter on target creature.

How it works : Rocksteady, Mutant Marauder

Original English text — Wizards of the Coast / Scryfall

#1January 27, 2026· Wizards of the Coast
Both commanders start in the command zone, and the remaining 98 cards your deck are shuffled to become your library.
No other card is named in this ruling.
#2January 27, 2026· 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.
#3January 27, 2026· 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.
#4January 27, 2026· 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, whether or not they have that card in their library.
No other card is named in this ruling.
#5January 27, 2026· Wizards of the Coast
"Partner with [name]" represents two abilities. The first is a triggered ability: "When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle."
No other card is named in this ruling.
#6January 27, 2026· 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 Bebop, Skull and Crossbones and Rocksteady, Mutant Marauder are your commanders, your deck may contain cards with black and/or green in their color identities, but not white, blue, or red.
No other card is named in this ruling.
#7January 27, 2026· 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.
#8January 27, 2026· 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.
No other card is named in this ruling.
#9January 27, 2026· Wizards of the Coast
To have two commanders, both must have the partner ability 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.

Popular combos

Real combos played by the community, sorted by popularity.

#1
Viscera Seer + Rocksteady, Mutant Marauder
Infinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggers
1Activate Viscera Seer by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Resolve the Viscera Seer ability.
5Repeat

#1
Viscera Seer + Rocksteady, Mutant Marauder
Infinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggers
1Activate Viscera Seer by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Resolve the Viscera Seer ability.
5Repeat

#2
Carrion Feeder + Rocksteady, Mutant Marauder
Infinite +1/+1 counters on a creatureInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggers
1Activate Carrion Feeder by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Resolve the Carrion Feeder ability.
5Repeat

#3
Ashnod's Altar + Rocksteady, Mutant Marauder
Infinite colorless manaInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggers
1Activate Ashnod's Altar by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Repeat

#4
Umbral Collar Zealot + Rocksteady, Mutant Marauder
Infinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggers
1Activate Umbral Collar Zealot by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Resolve the Umbral Collar Zealot ability.
5Repeat

#5
Rocksteady, Mutant Marauder + Evolution Witness + Walking Ballista
Infinite creature ETBInfinite creature LTBInfinite death triggersInfinite proliferate
1Cast Walking Ballista by paying .
2Walking Ballista enters and dies as a state-based action due to having 0 toughness.
3Rocksteady triggers, putting a +1/+1 counter on Evolution Witness.
4Evolution Witness triggers, returning Walking Ballista from your graveyard to your hand.
5Repeat.

#6
Altar of Dementia + Rocksteady, Mutant Marauder
Infinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggers
1Activate Altar of Dementia by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Resolve the Altar of Dementia ability.
5Repeat

#7
Yahenni, Undying Partisan + Rocksteady, Mutant Marauder
Infinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite death triggers
1Activate Yahenni by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Resolve the Yahenni ability.
5Repeat

#8
Phyrexian Altar + Rocksteady, Mutant Marauder
Infinite colored manaInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggers
1Activate Phyrexian Altar by sacrificing the persist creature.
2When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3When the persist creature enters, Rocksteady triggers, putting a +1/+1 counter on that creature.
4Repeat

Interactions with other cards

These cards' text mentions Rocksteady, Mutant Marauder.

Bebop, Skull & Crossbones

Partner with Rocksteady, Mutant Marauder (When this creature enters, target player may put Rocksteady into their hand from their library, then shuffle.) Deathtouch Whenever Bebop deals combat damage to a player, you may draw X cards, where X is the number of counters on Bebop. If you do, you lose X life.