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15 rules

Rule #	Text
702.124	Partner
702.124a	Partner abilities are keyword abilities that modify the rules for deck construction in the Commander variant (see rule 903), and they function before the game begins. Each partner ability allows you to designate two legendary cards as your commander rather than one. Each partner ability has its own requirements for those two commanders. The partner abilities are: partner, partner—[text], partner with [name], choose a Background, and Doctor’s companion.
702.124b	Your deck must contain exactly 100 cards, including its two commanders. Both commanders begin the game in the command zone.
702.124c	A rule or effect that refers to your commander’s color identity refers to the combined color identities of your two commanders. See rule 903.4.
702.124d	Except for determining the color identity of your commander, the two commanders function independently. When casting a commander with partner, ignore how many times your other commander has been cast (see rule 903.8). When determining whether a player has been dealt 21 or more combat damage by the same commander, consider damage from each of your two commanders separately (see rule 903.10a).
702.124e	If an effect refers to your commander while you have two commanders, it refers to either one. If an effect causes you to perform an action on your commander and it could affect both, you choose which it refers to at the time the effect is applied.
702.124f	Different partner abilities are distinct from one another and cannot be combined. For example, you cannot designate two cards as your commander if one of them has “partner” and the other has “partner with [name].”
702.124g	If a legendary card has more than one partner ability, you may choose which one to use when designating your commander, but you can’t use both. Notably, no partner ability or combination of partner abilities can ever let a player have more than two commanders.
702.124h	“Partner” means “You may designate two legendary cards as your commander rather than one if each of them has partner.”
702.124i	“Partner—[text]” means “You may designate two legendary cards as your commander rather than one if each of them has the same ‘partner—[text]’ ability.” The “partner—[text]” abilities are “partner—Character select,” “partner—Father & son,” “partner—Friends forever,” and “partner—Survivors.”
702.124j	“Partner with [name]” represents two abilities. It means “You may designate two legendary cards as your commander rather than one if each has a ‘partner with [name]’ ability with the other’s name” and “When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle.”
702.124k	“Choose a Background” means “You may designate two cards as your commander rather than one if one of them is this card and the other is a legendary Background enchantment card.” You can’t designate two cards as your commander if one has a “choose a Background” ability and the other is not a legendary Background enchantment card, and legendary Background enchantment cards can’t be your commander unless you have also designated a commander with “choose a Background.”
702.124m	“Doctor’s companion” means “You may designate two legendary creature cards as your commander rather than one if one of them is this card and the other is a legendary Time Lord Doctor creature card that has no other creature types.”
702.124n	If an effect refers to a partner ability by name, it means only that partner ability and not any others. If an effect refers to the partner ability or cards with partner and doesn’t mention a specific variant of the partner ability by name, it is referring only to partner, partner—[text], partner with [name], or cards with any of those abilities, and it does not refer to any other partner variant.
903.13f	Commander Draft deck construction follows the same rules as Commander deck construction (see rule 903.5) with three exceptions: (1) A player’s deck must contain at least 60 cards. There is no maximum deck size. (2) A player’s deck may include any number of cards from that player’s card pool with the same name. (3) If the draft contained draft boosters from Commander Masters, any card which can be a player’s commander by itself and whose color identity includes one or fewer colors is considered to have the partner ability for the purposes of deckbuilding. (See rule 702.124, “Partner.”)

Rule #

Text

702.124

Partner

702.124a

Partner abilities are keyword abilities that modify the rules for deck construction in the Commander variant (see rule 903), and they function before the game begins. Each partner ability allows you to designate two legendary cards as your commander rather than one. Each partner ability has its own requirements for those two commanders. The partner abilities are: partner, partner—[text], partner with [name], choose a Background, and Doctor’s companion.

702.124b

Your deck must contain exactly 100 cards, including its two commanders. Both commanders begin the game in the command zone.

702.124c

A rule or effect that refers to your commander’s color identity refers to the combined color identities of your two commanders. See rule 903.4.

702.124d

Except for determining the color identity of your commander, the two commanders function independently. When casting a commander with partner, ignore how many times your other commander has been cast (see rule 903.8). When determining whether a player has been dealt 21 or more combat damage by the same commander, consider damage from each of your two commanders separately (see rule 903.10a).

702.124e

If an effect refers to your commander while you have two commanders, it refers to either one. If an effect causes you to perform an action on your commander and it could affect both, you choose which it refers to at the time the effect is applied.

702.124f

Different partner abilities are distinct from one another and cannot be combined. For example, you cannot designate two cards as your commander if one of them has “partner” and the other has “partner with [name].”

702.124g

If a legendary card has more than one partner ability, you may choose which one to use when designating your commander, but you can’t use both. Notably, no partner ability or combination of partner abilities can ever let a player have more than two commanders.

702.124h

“Partner” means “You may designate two legendary cards as your commander rather than one if each of them has partner.”

702.124i

“Partner—[text]” means “You may designate two legendary cards as your commander rather than one if each of them has the same ‘partner—[text]’ ability.” The “partner—[text]” abilities are “partner—Character select,” “partner—Father & son,” “partner—Friends forever,” and “partner—Survivors.”

702.124j

“Partner with [name]” represents two abilities. It means “You may designate two legendary cards as your commander rather than one if each has a ‘partner with [name]’ ability with the other’s name” and “When this permanent enters, target player may search their library for a card named [name], reveal it, put it into their hand, then shuffle.”

702.124k

“Choose a Background” means “You may designate two cards as your commander rather than one if one of them is this card and the other is a legendary Background enchantment card.” You can’t designate two cards as your commander if one has a “choose a Background” ability and the other is not a legendary Background enchantment card, and legendary Background enchantment cards can’t be your commander unless you have also designated a commander with “choose a Background.”

702.124m

“Doctor’s companion” means “You may designate two legendary creature cards as your commander rather than one if one of them is this card and the other is a legendary Time Lord Doctor creature card that has no other creature types.”

702.124n

If an effect refers to a partner ability by name, it means only that partner ability and not any others. If an effect refers to the partner ability or cards with partner and doesn’t mention a specific variant of the partner ability by name, it is referring only to partner, partner—[text], partner with [name], or cards with any of those abilities, and it does not refer to any other partner variant.

903.13f

Commander Draft deck construction follows the same rules as Commander deck construction (see rule 903.5) with three exceptions: (1) A player’s deck must contain at least 60 cards. There is no maximum deck size. (2) A player’s deck may include any number of cards from that player’s card pool with the same name. (3) If the draft contained draft boosters from Commander Masters, any card which can be a player’s commander by itself and whose color identity includes one or fewer colors is considered to have the partner ability for the purposes of deckbuilding. (See rule 702.124, “Partner.”)