For example, there's a Cephalid Shrine on the field and someone casts a spell with no copies in any graveyards. Can someone choose to counter their own spell by not paying 0 mana?

I don't think there's anything in the rules preventing this, but I do know that things like 0 power attacks can't interact with combat damage triggers. Is there a similar case for costs of 0 being automatically paid?


Rule 117.5 states:

117.5. Some costs are represented by {0}, or are reduced to {0}. The action necessary for a player to pay such a cost is the player’s acknowledgment that they are paying it. Even though such a cost requires no resources, it’s not automatically paid.

So, it is possible to refuse to pay an optional payment with a cost of 0 mana, and a person can counter their own spell by refusing to pay the cost of 0 mana.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.