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Companion cards will function in commander, and rather unusually at that. Their behaviour in Commander is described by two key sources quoted below. To summarise: Your Commander is counted as part of your starting deck. (Even if you might remove your commanders from your deck before your game begins.) A companion card is not one of your 100 cards. If you ...


7

Yes, the Mutate cost is an alternative cost. No, you can't pay WUBRG for Mutate through Jodah, and that is because both are alternative costs. A spell's mana cost is only what's printed in the upper right corner of the card, nothing else. In particular, an alternative cost is not a mana cost. 202.1. A card’s mana cost is indicated by mana symbols near ...


6

From the article Some creatures, like Bristling Boar above, have abilities that refer to themselves by name. Remember that from a rules perspective, a card using its own name in an ability really just means "me." For example, if Cloudpiercer ends up on top of Bristling Boar, that ability will work on the resulting creature. As per Rule 201.4: Text ...


5

The commander tax never resets, but it also doesn't count times when it isn't cast from the command zone; so you must pay an additional {4} in your case. 903.8. A player may cast a commander they own from the command zone. A commander cast from the command zone costs an additional {2} for each previous time the player casting it has cast it from the ...


2

"Medomai the Ageless can’t attack during extra turns." All that Medomai cares about is "Is this an extra turn" it doesn't care what created that extra turn, so it can't attack on an extra turn it created, a different Medomai created, or one that was created by say Nexus of Fate. If it had been written "Medomai the Ageless can’t attack during extra turns ...


2

There are now different kinds of cards split similar to these, and some of the rules have changed since the original question was asked. Basic Split Cards For example: Fire // Ice. These cards are read with an “and” joining the two names, thus “Turn and Burn”. These cards work exactly the way you asked, you cast one half of the card for the casting cost, ...


2

Eli Shiffrin's response to this question in a Reddit AMA: If any card in the merged permanent is your commander, the whole thing is your commander. (Eli Shiffrin is the MTG Rules Manager) Link to the answer


2

The cards are considered only 1 creature; 1 permanent. The cards on the bottom do not exist in any meaningful sense as their own thing. They are not objects in the game; so nothing could target them. A bottom card has no types, no name, no mana cost, nothing; so it would not interact in any way with the legend rule. From the Ikoria mechanics article: As ...


1

The resulting creature is the same game object that you already had on the battlefield before; all it does is change characteristics. Similar to if someone cast a Turn to Frog on it. This is the case whether you put the original creature card on top or on bottom of the new mutate card. From the Ikoria mechanics article: It simply makes the creature ...


1

Winrate when going first and second: this is clearly going to depend on the format, and since all the commonly-played formats are changing over time, this data will never remain up-to-date. Wizards does not publish the data, so it's up to players to find as much information as they can. There is nonetheless some data available: Play or draw? The Trouble ...


1

The Ikoria Mechanics Article has the following paragraph about using the Mutate ability: As a mutating creature spell resolves, instead of entering the battlefield, it merges with its target into one creature. Its controller chooses to put the resolving mutating creature spell on top of its target or underneath it. You'll end up with a pile of cards (or ...


1

Most of these pillow fort effects have similar wording, which includes the phrase "can't attack you". Here's a Scryfall search for cards printed in a core/expansion set (no Commander or promo sets) which returns 19 results as of this answer's posting. Results seem to be divides into a few categories: Permanents that tax or otherwise prevent opponents from ...


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