Command the Chaff #18
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Card Details
Look at target opponent's sideboard. You may cast a card from that sideboard without paying its mana cost.
Exile Command the Chaff.
Illustrated by George Fan
Rulings (5)
Nov 12, 2019
If a spell has 
in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
Nov 12, 2019
If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, such as that of Tormenting Voice, you must pay those to cast the card.
Nov 12, 2019
In a Limited event, each card a player opened (in a Sealed Deck event) or drafted (in a Booster Draft event) is their sideboard.
Nov 12, 2019
You can't play land cards from that sideboard.
Nov 12, 2019
You must cast the sideboard card you wish to cast while Command the Chaff is resolving. You can't cast it later in the turn.
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