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For each creature, its controller sacrifices a permanent unless they pay {1}.
At the beginning of the resolution, each player counts up the number of creatures they control, then they make the required number of payments and/or sacrifices. The active player announces their choices first followed by the other players, but all the sacrifices are done at the same time. Because of this, you can’t sacrifice one creature in order to pay for another and thereby avoid payment for the first.
You can activate mana abilities during the resolution if you decide to pay mana.
You can choose to pay some mana and sacrifice some permanents if you have more than one creature.
