Search

If any players wish to reveal a card with a companion ability that they own from outside the game, they may do so. A player may reveal no more than one card this way, and they may do so only if their deck fulfills the condition of that card’s companion ability. The revealed card remains outside the game. (See rule 702.139, “Companion.”)

If an ability would produce one or more mana of an undefined type, it produces no mana instead.

Some abilities produce mana based on the type of mana another permanent or permanents “could produce.” The type of mana a permanent could produce at any time includes any type of mana that an ability of that permanent would produce if the ability were to resolve at that time, taking into account any applicable replacement effects in any possible order. Ignore whether any costs of the ability could or could not be paid. If that permanent wouldn’t produce any mana under these conditions, or no type of mana can be defined this way, there’s no type of mana it could produce.

To “tap [a permanent] for mana” is to activate a mana ability of that permanent that includes the {T} symbol in its activation cost. See rule 605, “Mana Abilities.”

An ability that triggers whenever a permanent “is tapped for mana” or is tapped for mana of a specified type triggers whenever such a mana ability resolves and produces mana or the specified type of mana.

A replacement effect that applies if a permanent “is tapped for mana” or tapped for mana of a specific type and/or amount modifies the mana production event while such an ability is resolving and producing mana or the specified type and/or amount of mana.

If an object’s enters-the-battlefield triggered ability or replacement effect refers to X, and the spell that became that object as it resolved had a value of X chosen for any of its costs, the value of X for that ability is the same as the value of X for that spell, although the value of X for that permanent is 0. This is an exception to rule 107.3i.

The tap symbol is {T}. The tap symbol in an activation cost means “Tap this permanent.” A permanent that’s already tapped can’t be tapped again to pay the cost. A creature’s activated ability with the tap symbol in its activation cost can’t be activated unless the creature has been under its controller’s control continuously since their most recent turn began. See rule 302.6.

Paying {3} to put your companion into your hand is a special action. It doesn’t use the stack and players can’t respond to it. Once you take this action, you may cast that card if it’s legal to do so before any other player can take actions.

Playtest cards aren’t legal for play in any tournament format other than Mystery Booster Limited formats. On the other hand, we expect they will spice up a wide variety of non-tournament games (as long as everyone’s on the same page about using them!).

Expansion symbols on playtest background cards don’t count, even if they’re partially visible.

Your companion begins the game outside the game. In tournament play, this means your sideboard. In non-tournament play, it’s simply a card you own that’s not in your starting deck.

If more than one player wishes to reveal a companion, the starting player does so first, and players proceed in turn order. Once a player has chosen not to reveal a companion, that player can’t change their mind.

The companion ability has no effect if the card isn’t revealed as your companion at the start of the game, and it creates no restrictions on putting a card with a companion ability into your starting deck. For example, Lutri, Pauper Otter may be in your starting deck even if your starting deck contains cards with silver, gold, orange, and/or purple expansion symbols.

The companion’s other abilities apply only if the creature is on the battlefield. They have no effect while the companion is outside the game.

You may have one companion in the Commander variant. Your deck, including your commander, must meet its companion requirement. Your companion is not one of your 100 cards.

If you reveal a companion outside the game, for as long as it remains there, you may pay {3} any time you could cast a sorcery (that is, you have priority during your main phase and the stack is empty). Once you do, you put it into your hand and it behaves like any other card you’ve brought into the game. For example, if it’s discarded, countered, or destroyed, put it into your graveyard.

For many playtest cards, you’ll need to make a generous assumption that basic game rules would be updated to allow them to work. The Mystery Booster 2 Playtest Card Notes section (reproduced here in individual Gatherer rulings) provides guidance for fitting these cards into the existing rules structure.

Lutri, Pauper Otter’s companion restriction cares about the color of a card’s expansion symbol, not its rarity. If a card has no expansion symbol printed on it, it doesn’t violate Lutri’s companion restriction even if its rarity isn’t common.

The requirements of the companion ability apply only to your starting deck. They do not apply to your sideboard, nor to any cards added to your deck after the game began (such as with the conjure mechanic).

Before shuffling your deck to become your library, you may reveal one card from outside the game to be your companion if your starting deck meets the requirements of the companion ability. You can’t reveal more than one. It remains revealed outside the game as the game begins.

Playtest cards use a modified version of game symbols, such as {T} and {W}. These modified symbols should be treated as the standard symbols during play.