Rule 425.1
Countering is the act of negating the execution, activation, or otherwise playing of a card or ability by a player.
- 425.1.a A card or ability that is Countered does nothing and is cleared from the chain.
- 425.1.b A card that is Countered is not considered to have been played for abilities that trigger on cards being played.
- 425.1.c Countering does not refund any costs paid to play a card, activate an ability, or trigger an ability.