Crossover Collaboration 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
Teamwork 2 (As an additional cost to cast this spell, you may tap any number of creatures you control with total power 2 or more.) Exile the top two cards of your library. Until the end of your next turn, you may play those cards. If this spell was cast using teamwork, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
Complete guide
Crossover Collaboration is a versatile red instant that showcases the Teamwork mechanic, allowing you to turn your creatures' presence into extra resources. This spell provides card advantage by exiling the top of your library for later use, while potentially refunding some of its cost in the form of a Treasure token. It is an excellent way to bridge your turns and set up future plays without losing momentum.
Understanding Teamwork
Teamwork is an optional additional cost. When you cast Crossover Collaboration, you can choose to tap any number of creatures you control as long as their combined power is 2 or greater. Tapping a single creature with power 2 works, as does tapping two creatures with power 1. This decision is made as you cast the spell, and it determines whether or not you receive the bonus Treasure token upon resolution.
Resolving the Collaboration
Once the spell resolves, you exile the top two cards of your library. You can play these cards—meaning you can cast them if they are spells or play them if they are lands—until the end of your next turn. If you satisfied the Teamwork cost by tapping your creatures during the casting process, you then create a Treasure token. Note that if the spell is countered, you do not get to exile the cards or create the Treasure.
Timing and Strategy
Because this is an instant, you can cast it on an opponent's end step to have access to those exiled cards throughout your entire following turn. A common mistake is forgetting that you must still pay the costs for the exiled cards you wish to play. Additionally, tapping creatures for Teamwork means they won't be available to block, so evaluate the board state carefully before committing your 'team' to the spell.
Interaction examples
TreasureIf you tap creatures with total power 2 or more to pay the Teamwork cost, Crossover Collaboration creates a Treasure token. You can immediately sacrifice this Treasure to add one mana of any color, effectively reducing the net cost of the spell to two mana or saving that mana for a spell you exiled.
Deflecting SwatIf an opponent attempts to use Deflecting Swat on your Crossover Collaboration, it will have no effect because Crossover Collaboration does not have any targets. The spell will resolve as normal, exiling your cards and granting you a Treasure if Teamwork was paid.
Chaos WarpIf you cast Crossover Collaboration and an opponent responds with Chaos Warp to remove one of your power 2 creatures, it does not stop the spell. Since Teamwork is paid as an additional cost while casting, the creatures are already tapped and the cost is paid before your opponent can react with an instant.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Crossover Collaboration
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
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Meta decks with Crossover Collaboration
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